Edge magnetoplasma excitations in a two-dimensional electron system with strong screening

被引：7

作者：

Gubarev, S. I. ^{[1
]}

Muravev, V. M. ^{[1
]}

Andreev, I. V. ^{[1
]}

Belyanin, V. N. ^{[1
,2
]}

Kukushkin, I. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow Region, Russia

[2] State Univ, Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Region, Russia

来源：

JETP LETTERS | 2015年 / 102卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

PLASMA-WAVES; GAS; RESONANCE;

D O I：

10.1134/S0021364015190078

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The dispersion of plasma and magnetoplasma excitations in two-dimensional electron systems with a closely spaced back gate is experimentally investigated using optical detection of microwave absorption. In disk samples, both cyclotron and edge screened magnetoplasmons are observed. It is established that the magneticfield behavior of both modes is in good agreement with the existing theory describing the dispersion of screened magnetoplasma excitations. It is shown that, in a strong magnetic field, the dispersion of screened magnetoplasma excitations is quadratic. This makes it possible to associate magnetoplasma waves with a quasiparticle with a mass, which possesses a number of unique properties.

引用

页码：461 / 464

页数：4

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