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Electronic structure and exchange interaction in Ga1-x Mn x As and In1-x Mn x Sb magnetic semiconductors
被引:8
|作者:
Yarzhemsky, V. G.
[1
]
Murashov, S. V.
[1
]
Izotov, A. D.
[1
]
机构:
[1] Russian Acad Sci, NS Kurnakov Gen & Inorgan Chem Inst, Leninskii Pr 31, Moscow 119991, Russia
基金:
俄罗斯基础研究基金会;
关键词:
diluted magnetic semiconductors;
spintronics;
exchange interaction;
FERROMAGNETISM;
D O I:
10.1134/S0020168516020175
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
We have calculated the electronic structure of Ga1-x Mn (x) As and In1-x Mn (x) Sb diluted magnetic semiconductors and shown that, in agreement with recent photoelectron spectroscopy data, the Mn 4s and Mn 3d orbitals are hybridized with the valence band of the host semiconductor. A new approach has been developed for calculating exchange interaction in diluted magnetic semiconductors, which is based on the spin polarization of s-electrons at a magnetic center due to single-center exchange s-d matrix elements. The magnitude of exchange interaction calculated using Hartree-Fock atomic wave functions and the electrondensity-functional approach agrees well with previous data.
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页码:89 / 93
页数:5
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