PHONONS AS COLLECTIVE MODES - THE CASE OF A 2-DIMENSIONAL WIGNER CRYSTAL IN A STRONG MAGNETIC-FIELD

被引：64

作者：

COTE, R

MACDONALD, AH

机构：

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.65.2662

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a fully-quantum-mechanical theory for the phonon modes of a two-dimensional Wigner crystal in the strong-magnetic-field limit. Our theory is based on a time-dependent Hartree-Fock approximation of the density-density response function, which is exact in the harmonic limit but allows for arbitrarily large anharmonicity. Our calulation is facilitated by identities, valid in the strong-magnetic-field limit, which allow to be expressed solely in terms of the ground-state electron density. © 1990 The American Physical Society.

引用

页码：2662 / 2665

页数：4

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