WIGNER CRYSTAL IN ONE-DIMENSION

被引:431
作者
SCHULZ, HJ
机构
[1] Laboratoire de Physique des Solides, Université Paris-Sud
关键词
D O I
10.1103/PhysRevLett.71.1864
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A one-dimensional gas of electrons interacting with long-range Coulomb forces [V(r) almost-equal-to 1/r] is investigated. The excitation spectrum consists of separate collective charge and spin modes. For arbitrarily weak Coulomb repulsion density correlations at wave vector 4k(F) decay extremely slowly and are best described as those of a one-dimensional Wigner crystal. Pinning of the Wigner crystal then leads to the nonlinear transport properties characteristic of charge density waves. The results allow a consistent interpretation of the plasmon and spin excitations observed in one-dimensional semiconductor structures, and suggest an interpretation of some of the observed features in terms of ''spinons.''
引用
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页码:1864 / 1867
页数:4
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