In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 19, No. S3 ( 1980-01-01), p. 223-
Abstract:
The electronic band structures of ferromagnetic semiconductors CdCr 2 S 4 , CdCr 2 Se 4 , and HgCr 2 Se 4 are calculated self-consistently by the DV-Xα method. The general features of the band structures are quite similar for three substances except for the relative positions of the 3 d bands: Each structure consists of relatively narrow valence bands, fairly wide conduction bands, and very narrow d bands. The d ε and d γ bands for up-spin lie in the energy region near the top of the valence bands and around the bottom of the conduction bands, respectively, and both d bands for down-spin fall in the conduction bands. The fundamental energy gap at the Γ point is 2.6, 2.3 and 1.8 eV for CdCr 2 S 4 , CdCr 2 Se 4 , and HgCr 2 Se 4 , respectively. The spin polarization of the Cr-3 d orbitals is about 3.5, while the spin polarization of the valence p orbitals of a chalcogen ion has the opposite sign.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.7567/JJAPS.19S3.223
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1980
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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