LIGHT-SCATTERING DETERMINATION OF ROTON DENSITIES OF STATES IN 2-DIMENSIONAL LANDAU-LEVEL EXCITATIONS

被引：8

作者：

PINCZUK, A ^{[1
]}

VALLADARES, JP ^{[1
]}

HEIMAN, D ^{[1
]}

PFEIFFER, LN ^{[1
]}

WEST, KW ^{[1
]}

机构：

[1] MIT,FRANCIS BITTER NATL MAGNET LAB,CAMBRIDGE,MA 02139

来源：

SURFACE SCIENCE | 1990年 / 229卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0039-6028(90)90912-R

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the observation of inelastic light scattering by large wavevector inter-Landau level excitations of the 2D electron gas in a perpendicular magnetic field. In results from very high electron mobility single GaAs quantum wells we find evidence of excitonic binding and roton minima predicted by Hartree-Fock calculations. Massive breakdown of wavevector conservation due to residual disorder allows this insight into Coulomb interactions. © 1990.

引用

页码：384 / 387

页数：4

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