DOUBLE QUANTUM-WELL ELECTRON-HOLE SYSTEMS IN STRONG MAGNETIC-FIELDS

被引:182
作者
YOSHIOKA, D [1 ]
MACDONALD, AH [1 ]
机构
[1] INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405
关键词
EXCITONIC STATE; FRACTIONAL QUANTUM HALL EFFECT; STRONG MAGNETIC FIELD; WIGNER CRYSTAL; ELECTRON-HOLE SYSTEM;
D O I
10.1143/JPSJ.59.4211
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Two-dimensional electron-hole systems with long excitonic life-times can be realized in double quantum well systems by applying an electric field which localizes electrons and holes in opposite wells. The ground state of such a system is investigated theoretically and numerically in the strong magnetic field limit. It is shown that when the separation between the electron layer and the hole layer, d, is small, an excitonic condensate state is realized. On the other hand, when d is large, either independent fractional quantum Hall states for electrons and holes or coupled Wigner crystal (dipole density wave) states may be realized depending on the filling factor. The difference in photoluminescence spectra between these states is discussed.
引用
收藏
页码:4211 / 4214
页数:4
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