MAGNETOROTONS IN QUASI-ONE-DIMENSIONAL ELECTRON-SYSTEMS IN THE ABSENCE OF KOHN THEOREM

被引：32

作者：

YANG, SRE

AERS, GC

机构：

[1] Institute for Microstructural Sciences, National Research Council of Canada, Ottawa

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.46.12456

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using a time-dependent Hartree-Fock approximation we have investigated the inter-Landau-level collective excitation spectrum of quasi-one-dimensional electron gases where Kohn's theorem is violated. We find that the spectrum develops a roton minimum at finite wave vectors. In addition to the main magnetoroton, extra collective modes are found. Also we find that it is important to include both the Hartree and exchange local-field corrections in a calculation of the cyclotron resonance.

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页码：12456 / 12459

页数：4

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