Lattice Expansion of (Ga,Mn)As: The Role of Substitutional Mn and of the Compensating Defects

• Authors: J. Mašek , F. Máca
• Languages of publication: EN

Abstracts

EN

We apply the density-functional technique to determine the lattice constant of GaAs supercells containing Mn_{Ga}, Mn_{int}, and As_{Ga} impurities, and use a linear interpolation to describe the dependence of the lattice constant a of Ga_{1-x}Mn_{x}As on the concentrations of these impurities. The results of the supercell calculations confirm that Mn_{Ga} does not contribute to the lattice expansion. The increase in a is due to both Mn_{int} and As_{Ga}, that are both created in the as-grown (Ga,Mn)As in proportion to x, and that are most probably present in a remarkable amount also in the best annealed materials.

Keywords

EN

71.15.Ap; 71.20.Nr; 71.55.Eq; 75.50.Pp

Discipline

• 71.15.Ap: Basis sets (LCAO, plane-wave, APW, etc.) and related methodology (scattering methods, ASA, linearized methods, etc.)
• 71.55.Eq: III-V semiconductors
• 75.50.Pp: Magnetic semiconductors
• 71.20.Nr: Semiconductor compounds

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 108
• Issue: 5
• Pages: 789-794

Dates

published

2005-11

received

2005-06-04

Contributors

author

J. Mašek

• Institute of Physics, AS CR, Na Slovance 2, 182 21 Prague 8, Czech Republic

author

F. Máca

• Institute of Physics, AS CR, Na Slovance 2, 182 21 Prague 8, Czech Republic

References

• 1. H. Ohno, Science, 281, 951, 1998
• 2. T. Dietl, H. Ohno, F. Matsukura, J. Cibert, D. Ferrand, Science, 287, 1019, 2000
• 3. H. Ohno, J. Magn. Magn. Mater., 200, 110, 1999
• 4. G.M. Schott, G. Schmidt, G. Karczewski, L.W. Molenkamp, R. Jakiela, A. Barcz, G. Karczewski, Appl. Phys. Lett., 82, 4678, 2003
• 5. J.A. Dean, Langes' Handbook of Chemistry, Tab.3-118, McGraw-Hill, New York 1973
• 6. Yu-Jun Zhao, W.T. Geng, A.J. Freeman, B. Delley, Phys. Rev. B, 65, 113202, 2002
• 7. J. Masek, J. Kudrnovský, F. Máca, Phys. Rev. B, 67, 153203, 2003
• 8. J. Masek, I. Turek, J. Kudrnovský, F. Máca, V. Drchal, Acta Phys. Pol. A, 105, 637, 2004
• 9. I. Kuryliszyn-Kudelska, J.Z. Domagala, T. Wojtowicz, X. Liu, E. Lusakowska, W. Dobrowolski, J.K. Furdyna, J. Appl. Phys., 95, 603, 2004
• 10. J. Sadowski, J.Z. Domagala, Phys. Rev. B, 69, 075206, 2004
• 11. L.X. Zhao, C.R. Staddon, K.Y. Wang, K.W. Edmonds, R.P. Campion, B.L. Gallagher, C.T. Foxon, Appl. Phys. Lett., 86, 071912, 2005
• 12. P. Blaha, K. Schwarz, J. Luitz, WIEN97, FPLAPW package for calculating crystal properties, TU Vienna
• 13. J. Masek, F. Máca, Phys. Rev. B, 69, 165212, 2004
• 14. J. Masek, I. Turek, V. Drchal, J. Kudrnovský, F. Máca, Acta Phys. Pol. A, 102, 673, 2002
• 15. J. Masek, F. Máca, to be published

Identifiers

DOI

10.12693/APhysPolA.108.789