PL EN


Preferences help
enabled [disable] Abstract
Number of results
2006 | 110 | 2 | 249-254
Article title

Comparison of Exchange Interactions in II-VI, III-V, and I-II-V Dilute Magnetic Semiconductors: Density Functional Approach

Content
Title variants
Languages of publication
EN
Abstracts
EN
We use the coherent potential method based on the density-functional theory to compare the electronic structures and magnetic characteristics of mixed crystals (Ga,Mn)As, (Zn,Mn)Se, and Li(Zn,Mn)As. We show that, with the same degree of doping, the magnetic behavior of these materials is very similar, reflecting the similarity of their electronic structures. In particular, the superexchange in (Ga,Mn)As is as strong as in (Zn,Mn)Se and the ferromagnetic coupling in all these dilute magnetic semiconductors becomes dominant only at sufficient concentration of the holes. Remarkably, we find that ferromagnetic state appears not only in p-type, but also in n-type materials at a comparable level of doping. Although obtaining strongly n-type doped III-V dilute magnetic semiconductors is improbable, Li(Zn,Mn)As seems to be a promising candidate for a ferromagnetic n-type semiconductor.
Keywords
Year
Volume
110
Issue
2
Pages
249-254
Physical description
Dates
published
2006-08
received
2006-06-17
References
  • 1. J.K. Furdyna, J. Appl. Phys., 64, R29, 1988
  • 2. T. Jungwirth, J. Sinova, J. Masek, J. Kucera, A.H. MacDonald, Rev. Mod. Phys., in press (2006); cond-mat/0603380
  • 3. K.Y. Wang, R.P. Campion, K.W. Edmonds, M. Sawicki, T. Dietl, C.T. Foxon, B.L. Gallagher, AIP Conf. Proc., 772, 333, 2005
  • 4. H. Ohno, Science, 281, 951, 1998
  • 5. T. Dietl, H. Ohno, F. Matsukura, J. Cibert, D. Ferrand, Science, 287, 1019, 2000
  • 6. T. Jungwirth, W.A. Atkinson, B. Lee, A.H. MacDonald, Phys. Rev. B, 59, 9818, 1999
  • 7. T. Jungwirth, K.Y. Wang, J. Masek, K.W. Edmonds, J. Konig, J. Sinova, M. Polini, N.A. Goncharuk, A.H. MacDonald, M. Sawicki, A.W. Rushforth, R.P. Campion, L.X. Zhao, C.T. Foxon, B.L. Gallagher, Phys. Rev. B, 72, 165204, 2005
  • 8. L.M. Sandratskii, P. Bruno, Phys. Rev. B, 67, 214402, 2005
  • 9. L.M. Sandratskii, P. Bruno, Phys. Rev. B, 73, 045203, 2006
  • 10. Su-Huai Wei, A. Zunger, Phys. Rev. Lett., 56, 528, 1986
  • 11. I. Turek, V. Drchal, J. Kudrnovský, M. Sob, P. Weinberger, Electronic Structure of Disordered Alloys, Surfaces and Interfaces, Kluwer, Boston 1997
  • 12. J. Kudrnovský, I. Turek, V. Drchal, F. Máca, P. Weinberger, P. Bruno, Phys. Rev. B, 69, 115208, 2004
  • 13. J. Masek, Solid State Commun., 78, 351, 1991
  • 14. J. Kudrnovský, J. Masek, F. Máca, B.L. Gallagher, D.H. Gregory, T. Jungwirth, to be published
  • 15. J. Masek, I. Turek, J. Kudrnovský, F. Máca, V. Drchal, Acta Phys. Pol. A, 102, 637, 2004
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv110n220kz
Identifiers
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.