Diluted magnetic semiconductor quantum dots: An extreme sensitivity of the hole Zeeman splitting on the aspect ratio of the confining potential

被引:33
作者
Kyrychenko, FV [1 ]
Kossut, J [1 ]
机构
[1] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
关键词
D O I
10.1103/PhysRevB.70.205317
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The valence band states confined in infinitely deep quantum dots made of diluted magnetic semiconductors (DMS) are considered theoretically. A complex anisotropic structure of the valence bands in DMSs with cubic symmetry described by the full Luttinger Hamiltonian is taken into account. It is found that the Zeeman splitting is very sensitive to the shape of the confining potential and, in particular, to its orientation relative to the direction of an external magnetic field. This sensitivity has its origin in a mixing of different spin components of a hole wave function which takes place for finite hole wave vectors k. Several consequences of the effect are discussed, including a possibility to control the interdot tunneling by an external magnetic field. It is shown also that the polarizations of optical transitions in a single DMS quantum dot depend on details of geometry of its confining potential as well as on the strength of the magnetic field.
引用
收藏
页码:205317 / 1
页数:6
相关论文
共 18 条
[1]  
BASTARD G, 1977, P 3 INT C WARS, P63
[2]   NANOCRYSTALS OF DILUTED MAGNETIC SEMICONDUCTORS - MODEL FOR MAGNETIC POLARON [J].
BHATTACHARJEE, AK .
PHYSICAL REVIEW B, 1995, 51 (15) :9912-9916
[3]   Confinement-induced reduction of the effective exchange parameters in semimagnetic semiconductor nanostructures [J].
Bhattacharjee, AK .
PHYSICAL REVIEW B, 1998, 58 (23) :15660-15665
[4]   KINETIC EXCHANGE IN DILUTED MAGNETIC SEMICONDUCTORS [J].
BLINOWSKI, J ;
KACMAN, P .
PHYSICAL REVIEW B, 1992, 46 (19) :12298-12304
[5]  
Dietl T., 1994, HDB SEMICONDUCTORS B, V3, P1251
[6]   MAGNETOOPTICAL STUDY OF INTERFACE MIXING IN THE CDTE-(CD,MN)TE SYSTEM [J].
GAJ, JA ;
GRIESHABER, W ;
BODINDESHAYES, C ;
CIBERT, J ;
FEUILLET, G .
PHYSICAL REVIEW B, 1994, 50 (08) :5512-5527
[7]   RELATION OF MAGNETO-OPTICAL PROPERTIES OF FREE-EXCITONS TO SPIN ALIGNMENT OF MN2+ IONS IN CD1-XMNXTE [J].
GAJ, JA ;
PLANEL, R ;
FISHMAN, G .
SOLID STATE COMMUNICATIONS, 1979, 29 (05) :435-438
[8]   Atomic structure of InAs quantum dots on GaAs [J].
Jacobi, K .
PROGRESS IN SURFACE SCIENCE, 2003, 71 (5-8) :185-215
[9]  
JACZNYSKI M, 1977, P 3 INT C WARS, P325
[10]   Photoluminescence study of CdTe ZnTe self-assembled quantum dots [J].
Karczewski, G ;
Mackowski, S ;
Kutrowski, M ;
Wojtowicz, T ;
Kossut, J .
APPLIED PHYSICS LETTERS, 1999, 74 (20) :3011-3013