Dr. Nikolai A. Sobolev
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Dr. Nikolai A. Sobolev

Professor
Departamento de FØsica, Universidade de Aveiro, Portugal


Highest Degree
Ph.D. in Physical Science Engineering from Friedrich Schiller Jena University, Germany

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Biography

Dr. Nikolai A. Sobolev is currently working as Associate Professor at Physics Department, University of Aveiro, Portugal. He has completed his PhD in Semiconductor Physics from Friedrich Schiller University of Jena, Germany. He is founding member of Institute of Nanostructures, Nanomodelling and Nanofabrication. He has published more than 180 papers in refereed journals and conference proceedings with referee, and 3 book chapters contributed as author/co-author.

Area of Interest:

Physical Science Engineering
100%
Semiconductors
62%
Quantum-Size Semiconductor Structures
90%
Resistive Switching
75%
Composite Multiferroics
55%

Research Publications in Numbers

Books
0
Chapters
4
Articles
190
Abstracts
300

Selected Publications

  1. Vidal, J.V., A.A. Timopheev, A.L. Kholkin and N.A. Sobolev, 2015. Anisotropy of the magnetoelectric effect in tri-layered composites based on single-crystalline piezoelectrics. Vac., 122: 286-292.
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  2. Sobolev, N.A., N.M. Santos, J.P. Leitao, M.C. Carmo, D. Fuster, L. Gonzalez and W. Wesch, 2015. Enhanced radiation hardness of InAs/InP quantum wires. Phys/ status solidi B, 252: 134-138.
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  3. Siahlo, A.I., N.A. Poklonski, S.B. Lastovski, H. Presting and N.A. Sobolev, 2015. Influence of electron irradiation on p-n junctions in Si-Ge superlattices. Phys. status solidi B, 252: 153-158.
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  4. Rosario, C.M.M., O.N. Gorshkov, A.P. Kasatkin, I.N. Antonov, D.S. Korolev, A.N. Mikhaylov and N.A. Sobolev, 2015. Resistive switching and impedance spectroscopy in SiO x-based metal-oxide-metal trilayers down to helium temperatures. Vac., 122: 293-299.
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  5. Kalanda, N.A., L.V. Kovalev, J.C. Waerenborgh, M.R. Soares, M.L. Zheludkevich, M.V. Yarmolich and N.A. Sobolev, 2015. Interplay of superstructural ordering and magnetic properties of the sr2femoo6-δ double perovskite. Sci. Adv. Mater., 7: 446-454.
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  6. Djurabekova, F., E. Kotomin, M.C. Ridgway and N.A. Sobolev, 2015. Defect-induced effects in nanomaterials. Phys. status solidi C, 12: 9-9.
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  7. Zinovieva, A.F., N.P. Stepina, A.I. Nikiforov, A.V. Nenashev, A.V., Dvurechenskii, L.V., Kulik and N.A. Sobolev, 2014. Spin relaxation in inhomogeneous quantum dot arrays studied by electron spin resonance. Phys. Rev. B, 89: 45305-45305.
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  8. Timopheev, A.A., Y.G. Pogorelov, S. Cardoso, P.P Freitas, G.N. Kakazei and N.A. Sobolev, 2014. Dynamic exchange via spin currents in acoustic and optical modes of ferromagnetic resonance in spin-valve structures. Phys. Rev. B, 89: 144410-144410.
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  9. Kudrin, A.V., A.V. Shvetsov, Y.A. Danilov, A.A. Timopheev, D.A. Pavlov, A.I. Bobrov and N.A. Sobolev, 2014. Anomalous hall effect in two-phase semiconductor structures: the role of ferromagnetic inclusions. Phys. Rev. B, 90: 24415-24415.
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  10. Kopyl, S., A.A. Timopheev, V.S. Bystrov, I. Bdikin and B.M.S. Teixeira et al., 2014. FMR study of carbon nanotubes filled with Fe 3 O 4 nanoparticles. J. Magn. Magn. Mater., 358: 44-49.
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  11. Bunyaev, S.A., V.O. Golub, O.Y. Salyuk, E.V. Tartakovskaya and N.M. Santos et al., 2014. Splitting of standing spin-wave modes in circular submicron ferromagnetic dot under axial symmetry violation. Sci. rep., 5: 18480-18480.
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  12. Timopheev, A.A., N.A. Sobolev, Y.G. Pogorelov, S.A. Bunyaev, J.M. Teixeira, S. Cardoso and G.N. Kakazei, 2013. NiFe/CoFe/Cu/CoFe/MnIr spin valves studied by ferromagnetic resonance. J. Appl. Phys., 113: 713-713.
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  13. Timopheev, A.A., N.A. Sobolev, Y.G. Pogorelov, A.V. Talalaevskij, J.M. Teixeira, S. Cardoso and G.N. Kakazei, 2013. Resonant and non-resonant microwave absorption as a probe of the magnetic dynamics and switching in spin valves. J. Appl. Phys., 114: 23906-23906.
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  14. Timopheev, A.A., J.V. Vidal, A.L. Kholkin and N.A. Sobolev, 2013. Direct and converse magnetoelectric effects in Metglas/LiNbO3/metglas trilayers. J. Appl. Phys., 114: 44102-44102.
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  15. Timopheev, A.A., A.M. Azevedo, N.A. Sobolev, K. Brachwitz and M. Lorenz et al., 2013. Magnetic anisotropy of epitaxial zinc ferrite thin films grown by pulsed laser deposition. Thin Solid Films, 527: 273-277.
    CrossRef  |  Direct Link  |  
  16. Sobolev, N.A., 2013. Radiation effects in Si-Ge quantum size structure (Review). Semicond., 47: 217-227.
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  17. Sobolev, N., H. Bernas, E. Kotomin and K. Nordlund, 2013. Defect-induced effects in nanomaterials. Phys. status solidi C, 10: 601-602.
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  18. Santos, N.F., A.J.S. Fernandes, L.C. Alves, N.A. Sobolev, E. Alves, K. Lorenz and T. Monteiro, 2013. Microprobe analysis, iono-and photo-luminescence of Mn 2+ activated ZnGa 2 O 4 fibres. Nucl. Instrum. Methods Phys. Res., Sect. B, 306: 195-200.
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  19. Rosario, C.M.M., M.P.F. Graca, M.A. Valente, L.C. Costa, J. Rodrigues, T. Monteiro and N.A. Sobolev, 2013. Spectroscopy of radiation defects in rutile TiO2. Phys. status solidi B, 250: 843-849.
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  20. Kalanda, N.A., L.V. Kovalev, M.L. Zheludkevich, V.M. Garamus, R. Willumeit and N.A. Sobolev, 2013. Charge transfer processes and magnetoresistance in strontium ferromolybdate with dielectric barriers. Phys. status solidi B, 250: 825-830.
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  21. Gurskii, L.I., J. Macutkevic, J., Banys, A. Poddubskaya, M.N. Saraseko, A.V. Petrov and N.A. Sobolev, 2013. Synthesis and dielectric properties of Pb0. 85Ba0. 25Zr0. 53Ti0. 47O3 compounds with nano-inclusions of Cu and Ni. Phys. status solidi C, 10: 640-645.
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  22. Carvalho, T.T., J.R.A. Fernandes, J.P. de la Cruz, J.V. Vidal, N.A. Sobolev, F. Figueiras and P.B. Tavares, 2013. Room temperature structure and multiferroic properties in Bi 0.7 La 0.3 FeO 3 ceramics. J. Alloys Compd., 554: 97-103.
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  23. Timopheev, A.A., I. Bdikin, A.F. Lozenko, O.V. Stognei, A.V. Sitnikov, A. V. Los and N.A. Sobolev, 2012. Superferromagnetism and coercivity in Co-Al2O3 granular films with perpendicular anisotropy. J. Appl. Phys., 111: 123915-123915.
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  24. Teferi, M.Y., V.S. Amaral, A.C. Lounrenco, S. Das and J.S. Amaral et al., 2012. Magnetoelectric coupling in multiferroic heterostructure of rf-sputtered Ni-Mn-Ga thin film on PMN-PT. J. Magn. Magn. Mater., 324: 1882-1886.
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  25. Sousa, C.T., D.C. Leitao, M.P. Proenca, A. Apolinario, A.M. Azevedo, N.A. Sobolev and G.N. Kakazei, 2012. Probing the quality of Ni filled nanoporous alumina templates by magnetic techniques. J. nanosci. Nanotechnol., 12: 7486-7490.
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  26. Schmool, D.S., F.J.T. Goncalves, A. Apolinario, N. de Sousa, N.A. Sobolev, F. Casoli, and C. Hu, 2012. Modeling exchange-spring layered systems with perpendicular anisotropy using ferromagnetic resonance measurements. IEEE Trans. Magn., 48: 4081-4084.
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  27. Rodrigues, J., M. Peres, A.J.S. Fernandes, M.P.F. Graca, N.A. Sobolev, F.M. Costa and T. Monteiro, 2012. Structural, optical and magnetic resonance properties of TiO 2 fibres grown by laser floating zone technique. Appl. Surf. Sci., 258: 9143-9147.
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  28. Paz, E., F. Cebollada, F.J. Palomares, J.M. Gonzalez, J.S. Martins, N.M. Santos and N.A. Sobolev, 2012. Ferromagnetic resonance and magnetooptic study of submicron epitaxial Fe (001) stripes. J. Appl. Phys., 111: 123917-123917.
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  29. Kakazey, M., M. Vlasova, P.M. Aguilar, B.S. Coeto, R.G. Tapia and N.A. Sobolev, 2012. Reaction processes in a ZnO+ 1% Gd 2 O 3 powder mixture during mechanical and laser processing. Mater. Sci. Eng. B, 177: 1417-1422.
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  30. Andrade, R.R., A. Malachias, G. Kellerman, F.R. Negreiros, N.M. Santos, N.A. Sobolev and J.C. Gonzalez, 2012. Experimental evidence and modified growth model of alloying in In x Ga1-x as nanowires. J. Phys. Chem. C, 116: 24777-24783.
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  31. Strukova, G.K., G.V. Strukov, S.I. Bozhko, Y.P. Kabanov and I.M. Shmytko et al., 2011. Structure and magnetic properties of nanostructured Pd-Fe thin films produced by pulse electrodeposition. J. nanosci. Nanotechnol., 11: 8907-8911.
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  32. Rai, R., K. Verma, S. Sharma, S.S. Nair, M.A. Valente, A.L. Kholkin and N.A. Sobolev, 2011. Study of structural and ferromagnetic properties of pure and Cd doped copper ferrite. J. Phys. Chem. Solids, 72: 862-868.
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  33. Rai, R., K. Verma, S. Sharma, S.S. Nair, M.A. Valente, A.L. Kholkin and N.A. Sobolev, 2011. Structure and magnetic properties of Cd doped copper ferrite. J. Alloys Compd., 509: 7585-7590.
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  34. Leitao, J.P., A. Carvalho, J. Coutinho, R.N. Pereira and N.M. Santos et al., 2011. Influence of Ge content on the optical properties of X and W centers in dilute Si-Ge alloys. Phys. Rev. B, 84: 165211-165211.
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  35. Karpinsky, D.V., I.O. Troyanchuk, J.V. Vidal, N.A. Sobolev and A.L. Kholkin, 2011. Enhanced ferroelectric, magnetic and magnetoelectric properties of Bi 1- x Ca x Fe 1- x Ti x O 3 solid solutions. Solid State Commun., 151: 536-540.
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  36. Kalanda, N., S. Demyanov, W. Masselink, A. Mogilatenko, M. Chashnikova, N. Sobolev and O. Fedosenko, 2011. Interplay between phase formation mechanisms and magnetism in the Sr2FeMoO6-δ metal-oxide compound. Cryst. Res. Technol., 46: 463-469.
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  37. Zippel, J., M. Lorenz, A. Setzer, G. Wagner, N. Sobolev, P. Esquinazi and M. Grundmann, 2010. Defect-induced ferromagnetism in undoped and Mn-doped zirconia thin films. Phys. Rev. B, 82: 125209-125209.
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  38. Oliveira, F., M.F. Cerqueira, M.I. Vasilevskiy, T. Viseu and J. Ayres de Campos et al., 2010. Room temperature paramagnetism of ZnO:Mn films grown by RF-sputtering. Thin Solid Films, 518: 4612-4614.
    CrossRef  |  
  39. Khomchenko, V.A., D.V. Karpinsky, A.L. Kholkin, N.A. Sobolev, G.N. Kakazei, J.P. Araujo and J.A. Paixao, 2010. Rhombohedral-to-orthorhombic transition and multiferroic properties of Dy-substituted BiFeO3. J. Appl. Phys., 108: 74109-74109.
  40. Kakazei, G.N., N.M. Santos, C. Quiros, M. Velez and J.I. Martin et al., 2010. Magnetic properties of amorphous Co0. 74Si0. 26/Si multilayers with different numbers of periods. Low Temp. Phys., 36: 821-821.
  41. Chernenko, A.V., A.S. Brichkin, N.A. Sobolev and M.C. Carmo, 2010. Mechanisms of manganese-assisted non-radiative recombination in Cd (Mn) Se/Zn (Mn) Se quantum dots. J. Phys. Condens. Matter, 22: 355306-355306.
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  42. Ankiewicz, A.O., J.S. Martins, M.C. Carmo, M. Grundmann, S. Zhou, H. Schmidt and N.A. Sobolev, 2010. Ferromagnetic resonance on metal nanocrystals in Fe and Ni implanted ZnO. J. Appl. Phys., 107: 518-518.
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  43. Zinovieva, A.F., A.V. Dvurechenskii, N.P. Stepina, A.S. Deryabin and A.I. Nikiforov et al., 2009. Asymmetry effect on the spin relaxation in quantum dot structures. Phys. status solidi C, 6: 833-836.
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  44. Steinert, M., W. Wesch, A. Undisz, M. Rettenmayr, W.C. Nunes, R.P. Borges and N.A. Sobolev, 2009. Ion beam synthesis of Mn/Sb clusters in silicon. J. Phys. D Appl. Phys., 42: 35406-35406.
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  45. Khomchenko, V.A., D.A. Kiselev, M. Kopcewicz, M., Maglione and V.V. Shvartsman et al., 2009. Doping strategies for increased performance in BiFeO 3. J. Magn. Magn. Mater., 321: 1692-1698.
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  46. Kaydashev, V.E., E.M. Kaidashev, M. Peres, T. Monteiro, M.R. Correia, N.A. Sobolev and E. Alves, 2009. Structural and optical properties of Zn0. 9 Mn0. 1 O/ZnO core-shell nanowires designed by pulsed laser deposition. J. Appl. Phys., .
  47. Kaydashev, V.E., E.M. Kaidashev, M. Peres, T. Monteiro, M.R. Correia and N.A. Sobolev, 2009. Optical and structural properties of ZnO nanorods grown by pulsed laser deposition without catalyst. Tech. Phys., 54: 1607-1607.
  48. Kaidashev, V.E., O.V. Misochko, M.R. Correia, M. Peres, T. Monteiro, N.A. Sobolev and E.M. Kaidashev, 2009. Raman scattering on overtones of fully symmetric LO phonons in Zn0. 9Mn0. 1O nanocrystals under resonance excitation conditions. Tech. Phys. Lett., 35: 1086-1089.
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  49. Danilov, Y.A., A.V. Kudrin, O.V. Vikhrova, B.N. Zvonkov, Y.N., Drozdov, M.V. Sapozhnikov and N.A. Sobolev, 2009. Ferromagnetic semiconductor InMnAs layers grown by pulsed laser deposition on GaAs. J. Phys. D Appl. Phys., 42: 35006-35006.
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  50. Chernenko, A.V., A.S. Brichkin, V.D. Kulakovskii, N.A. Sobolev and S.V. Ivanov, 2009. Effect of Mn ions on spin relaxation and life-time of e-h complexes in CdSe/ZnSe/ZnMnSe quantum dots. Int. J. Mo. Phys. B, 23: 2984-2984.
  51. Ankiewicz, A.O., W. Gehlhoff, J.S. Martins, A.S. Pereira and S. Pereira et al., 2009. Magnetic and structural properties of transition metal doped zinc-oxide nanostructures. Phys. status solidi B, 246: 766-770.
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  52. Zinovieva, A.F., A.V. Dvurechenskii, N.P. Stepina, A.S. Deryabin and A.I. Nikiforov et al., 2008. Spin resonance of electrons localized on Ge∕ Si quantum dots. Phys. Rev. B, 77: 115319-115319.
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  53. Stepina, N.P., A.V. Dvurechenskii, V.A. Ambrister, J.V. Smagina, V.A. Volodin, A.V. Nenashev and N.A. Sobolev, 2008. MBE growth of Ge/Si quantum dots upon low-energy pulsed ion irradiation. Thin Solid Films, 517: 309-312.
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  54. Reis, M.S., R.M. Rubinger, N.A. Sobolev, M.A., Valente, K. Yamada, K., Sato and S. Gama, 2008. Influence of the strong magnetocrystalline anisotropy on the magnetocaloric properties of MnP single crystal. Phys. Rev. B, 77: 104439-104439.
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  55. Pereira, A.S., A.O. Ankiewicz, W. Gehlhoff, A. Hoffmann, S. Pereira, T. Trindade and N.A. Sobolev, 2008. Surface modification of Co-doped ZnO nanocrystals and its effects on the magnetic properties. J. Appl. Phys., 103: 140-140.
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  56. Magalhaes, S., N.A. Sobolev, N.V. Abrosimov and E. Alves, 2008. Study of SiGe alloys with different germanium concentrations implanted with mn and as ions. Mater. Sci. Forum, 587: 298-302.
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  57. Leitao, J.P., N.M. Santos, N.A. Sobolev, M.R. Correia, N.P. Stepina, M.C. Carmo and D.N. Lobanov, 2008. Radiation hardness of GeSi heterostructures with thin Ge layers. Mater. Sci. Eng. B, 147: 191-194.
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  58. Leitao, J.P., N.A. Sobolev, M.R. Correia, M.C. Carmo, N. Stepina, A. Yakimov and E. Alves, 2008. Electronic properties of Ge islands embedded in multilayer and superlattice structures. Thin Solid Films, 517: 303-305.
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  59. Khomchenko, V.A., D.A. Kiselev, J.M. Vieira, R.M., Rubinger, N.A. Sobolev, M. Kopcewicz and A.L. Kholkin, 2008. Coexistence of spontaneous ferroelectricity and weak ferromagnetism in Bi0. 8Pb0. 2FeO2. 9 perovskite. J. Phys. Condens. Matter, 20: 155207-155207.
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  60. Kakazei, G.N., P.P Martin, A. Ruiz, M. Varela, M., Alonso, E. Paz and N.A. Sobolev, 2008. Ferromagnetic resonance of ultrathin Co∕ Ag superlattices on Si (111). J. Appl. Phys., 103: 527-527.
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  61. Chahboun, A., M.I. Vasilevskiy, N.V. Baidus, A. Cavaco, N.A. Sobolev, M.C. Carmo and B.N. Zvonkov, 2008. Further insight into the temperature quenching of photoluminescence from InAs∕ GaAs self-assembled quantum dots. J. Appl. Phys., 103: 83548-83548.
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  62. Bouravleuv, A.D., S. Mitani, R.M. Rubinger, M.C. do Carmo, N.A. Sobolev, T. Ishibashi and K. Sato, 2008. Magnetic properties of MnP nanowhiskers grown by MBE. Physica. E, 40: 2037-2037.
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  63. Sobolev, N.A., M.A. Oliveira, R.M. Rubinger, A.J. Neves, M.C. Carmo, V.P. Lesnikov and G.N. Kakazei, 2007. Ferromagnetic resonance and hall effect characterization of GaMnSb layers. J. Supercond. Novel Magn., 20: 399-403.
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  64. Picht, O., W. Wesch, J. Biskupek, U. Kaiser, M.A. Oliveira, A. Neves and N.A. Sobolev, 2007. Ion beam synthesis of Mn/As-based clusters in silicon. Nucl. Instrum. Methods Phys. Res., Sect. B, 257: 90-93.
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  65. Nikiforov, A.I., V.V. Ulyanov, S.A. Teys, A.K. Gutakovsky, O.P. Pchelyakov, A.I. Yakimov and N.A. Sobolev, 2007. MBE growth of vertically ordered Ge quantum dots on Si. Phys. status solidi C, 4: 262-264.
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  66. Fonseca, A., E. Alves, J.P. Leitao, N.A. Sobolev, M.C. Carmo and A. Nikiforov, 2007. Optical and structural analysis of Ge/Si quantum dots grown on a Si (001) surface covered with a SiO 2 sub-monolayer. Int. J. Nanosci., 6: 245-248.
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  67. Ankiewicz, A.O., M.C. Carmo, N.A. Sobolev, W. Gehlhoff, E.M. Kaidashev, A. Rahm and M. Grundmann, 2007. Electron paramagnetic resonance in transition metal-doped ZnO nanowires. J. appl. Phys., 101: 24324-24324.
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  68. Yakimov, A.I., A.V. Dvurechenskii, G.M. Minkov, A.A. Sherstobitov and A.I. Nikiforov et al., 2006. Hopping magnetoresistance in two-dimensional arrays of Ge/Si quantum dots. Phys. Status Solidi C, 3: 296-296.
  69. Stepina, N.P., A.I. Yakimov, A.V. Nenashev, A.V. Dvurechenskii, N.A. Sobolev, J.P. Leitao, V.V. Kirienko, A.I. Nikiforov, E.S. Koptev, L. Pereira, and M.C. Carmo, 2006. Photoconductivity in tunneling-coupled Ge/Si quantum dot arrays. J. Exp. Theor. Phys., 103: 269-269.
  70. Sobolev, N.A., M.A. Oliveira, V.S. Amaral, A. Neves, M.C. Carmo, W. Wesch, O. Picht, E. Wendler, U. Kaiser and J. Heinrich, 2006. Ferromagnetism and ferromagnetic resonance in Mn implanted Si and GaAs. Mater. Sci. Forum, 514-516: 280-280.
  71. Sobolev, N.A., M.A. Oliveira, V.S. Amaral, A. Neves, M.C. Carmo, W. Wesch and J. Heinrich, 2006. Ferromagnetism and ferromagnetic resonance in Mn and As co-implanted Si and GaAs. Mater. Sci. Eng. B, 126: 148-150.
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  72. Magalhaes, S., A. Fonseca, N. Franco, N.P. Barradas, N. Sobolev, R. Hey and E. Alves, 2006. Damage behaviour of GaAs/AlAs multilayer structures. Nucl. Instrum. Methods Phys. Res., Sect. B, 249: 890-893.
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  73. Fonseca, A., N.A. Sobolev, J.P. Leitao, E. Alves, M.C. Carmo, N.D. Zakharov and G.E. Cirlin, 2006. Influence of defects on the optical and structural properties of Ge dots embedded in an Si/Ge superlattice. J. lumin., 121: 417-420.
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  74. Fonseca, A., E. Alves, N.P. Barradas, J.P., Leitao, N.A. Sobolev, M.C. Carmo and H. Presting, 2006. RBS/channeling study of buried Ge quantum dots grown in a Si layer. Nucl. Instrum. Methods Phys. Res., Sect. B, 249: 462-465.
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  75. Fonseca, A., E. Alves, J.P. Leitao, N.A. Sobolev, M.C. Carmo and A.I. Nikiforov, 2006. Ion beam analysis of Ge/Si dots grown on ultrathin SiO2 interlayers. Mater. Sci. forum, 514-516: 1121-1124.
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  76. Chahboun, A., N.V. Baidus, P.B. Demina, B.N. Zvonkov and M.J.M. Gomes et al., 2006. Influence of matrix defects on the photoluminescence of InAs self-assembled quantum dots. Phys. status solidi A, 203: 1348-1352.
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  77. Ankiewicz, A.O., N.A. Sobolev, J.P. Leitao, M.C. Carmo, R.N. Pereira, J.L. Hansen and A.N. Larsen, 2006. Effect of Ge doping on the creation of luminescent radiation defects in MBE Si. Nucl. Instrum. Methods Phys. Res., Sect. B, 248: 127-132.
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  78. Leitao, J.P., A. Fonseca, N.A. Sobolev, M.C. Carmo, N. Franco, A.D. Sequeira and N.N. Sibeldin, 2005. Low-temperature molecular beam epitaxy of Ge on Si. Mater. Sci. semicond. Process., 8: 35-39.
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  79. Fonseca, A., N. Franco, E. Alves, N.P. Barradas, J.P. Leitao, N.A. Sobolev and A.I. Nikiforov, 2005. High resolution backscattering studies of nanostructured magnetic and semiconducting materials. Nucl. Instrum. Methods Phys. Res., Sect. B, 241: 454-458.
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  80. Fonseca, A., E. Alves, J.P. Leitao, N.A. Sobolev, M.C. Carmo and A.I. Nikiforov, 2005. Optical and structural study of Ge/Si quantum dots on Si (100) surface covered with a thin silicon oxide layer. Mater. Sci. Eng. B, 124: 462-465.
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  81. Burbaev, T.M., V.A. Kurbatov, M.M. Rzaev, A.O. Pogosov and N.N. Sibel`din et al., 2005. Morphological transformation of a germanium layer grown on a silicon surface by molecular-beam epitaxy at low temperatures. Phys. Solid State, 47: 71-75.
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  82. Shaposhnikov, V.L. and N.A. Sobolev, 2004. The electronic structure and magnetic properties of transition metal-doped silicon carbide. J. Phys. Condens. Matter, 16: 1761-1761.
  83. Kholod, A.N., V.L. Shaposhnikov, N. Sobolev, V.E. Borisenko, F.A. D'Avitaya and S. Ossicini, 2004. Orientation effects in the electronic and optical properties of germanium quantum wires. Phys. Rev. B, 70: 35317-35317.
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  84. Fonseca, A., N.A. Sobolev, J.P. Leitao, M.C. Carmo, N. Franco, H. Presting and A.D. Sequeira, 2004. Structural characterization and luminescence of Ge/Si quantum dots. Mater. Sci. Forum, 455: 540-544.
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  85. Sobolev, N.A., G.D. Ivlev, E.I. Gatskevich, J.P. Leitao, A. Fonseca, M.C. Carmo and H. Presting, 2003. Pulsed laser annealing of Si-Ge superlattices. Mater. Sci. Eng. C, 23: 19-22.
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  86. Sobolev, N.A., A. Fonseca, J.P. Leitao, M.C. Carmo, H. Presting and H. Kibbel, 2003. Influence of defects on the luminescence of Ge/Si quantum dots. Phys. status solidi C, 4: 1267-1270.
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  87. Pereira, R.N., W. Gehlhoff, A.J. Neves, N.A. Sobolev, L. Rino and H. Kanda, 2003. The effect of high-pressure-high-temperature annealing on paramagnetic defects in diamond. J. Phys. Condens. Matter, 15: 2941-2941.
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  88. Pereira, R.N., W. Gehlhoff, A.J. Neves and N.A. Sobolev, 2003. Photoexcitation electron paramagnetic resonance studies on nickel-related defects in diamond. J. Phys. Condens. Matter, 15: 2493-2493.
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  89. Guffarth, F., R. Heitz, M. Geller, C. Kapteyn and H. Born et al., 2003. Radiation hardness of InGaAs/GaAs quantum dots. Appl. Phys. Lett., 82: 1941-1943.
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  90. Cavaco, A., N.A. Sobolev, M.C. Carmo, F. Guffarth, H. Born, R. Heitz and D. Bimberg, 2003. Carrier dynamics in particle-irradiated InGaAs/GaAs quantum dots. Phys. status solidi C, 4: 1177-1180.
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  91. Pereira, R.N., A.J. Neves, W. Gehlhoff, N.A. Sobolev, L. Rino and H. Kanda, 2002. Annealing study of the formation of nickel-related paramagnetic defects in diamond. Diamond relat. Mater., 11: 623-626.
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  92. Sobolev, N.A., A. Cavaco, M.C. Carmo, M. Grundmann, F. Heinrichsdorff and D. Bimberg, 2001. Enhanced radiation hardness of InAs/GaAs quantum dot structures. Phys. status solidi B, 224: 93-96.
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  93. Ribbat, C., R. Sellin, M. Grundmann, D. Bimberg, N.A. Sobolev and M.C. Carmo, 2001. Enhanced radiation hardness of quantum dot lasers to high energy proton irradiation. Electron. Lett., 37: 174-175.
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  94. Pereira, R.N., W. Gehlhoff, N.A. Sobolev, A.J. Neves and D. Bimberg, 2001. Photo-EPR studies on the AB3 and AB4 nickel-related defects in diamond. Phys. B Condens. Matter, 308: 589-592.
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  95. Pereira, R.N., W. Gehlhoff, N.A. Sobolev, A.J. Neves and D. Bimberg, 2001. Determination of the W8 and AB5 defect levels in the diamond gap. J. Phys. Condens. Matter, 13: 8957-8957.
  96. Cavaco, A., N.A. Sobolev, M.C. Carmo, H. Presting and U. Konig, 2001. Evaluation of the infrared absorption in nm-thick heavily boron-doped Si1-xGex layers on silicon. J. Mater. Sci. Mater. Electron., 12: 241-243.
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  97. Alves, E., A.D. Sequeira, N. Franco, M.F. Da Silva, J.C. Soares, N.A Sobolev and M.C Carmo, 2001. Coherent amorphization of Ge/Si multilayers with ion beams. Nucl. Instrum. Methods Phys. Res., Sect. B, 178: 279-282.
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  98. Neves, A.J., R. Pereira, N.A. Sobolev, M.H. Nazare, W. Gehlhoff, A. Naser and H. Kanda, 2000. New paramagnetic centers in annealed high-pressure synthetic diamond. Diamond Relat. Mater., 9: 1057-1060.
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