Ballistic phonon studies in the lowest Landau level

被引：3

作者：

Devitt, AM ^{[1
]}

Roshko, SH ^{[1
]}

Zeitler, U ^{[1
]}

Mellor, CJ ^{[1
]}

Kent, AJ ^{[1
]}

Benedict, KA ^{[1
]}

Cheng, T ^{[1
]}

Henini, M ^{[1
]}

机构：

[1] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

来源：

PHYSICA E | 2000年 / 6卷 / 1-4期

基金：

英国工程与自然科学研究理事会;

关键词：

fractional quantum Hall effect; acoustic phonon; magnetoroton; specific heat;

D O I：

10.1016/S1386-9477(99)00092-2

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report time-resolved studies of ballistic phonon absorption in the fractional quantum Hall regime at Landau level filling factors of v = 1/3, 2/5 and 1/2. The technique used can resolve the interaction of the two-dimensional electron system with LA and TA phonons and has been used to measure the temperature variation of the heat capacity of a single layer of electrons at v = 1/3. The energy gaps at v = 1/3 have also been measured and found to be in good agreement with theory. The roles of compressible and incompressible regions in the phonon absorption process are discussed. Angle resolved measurements at v = 2/5 are also in good agreement with theory. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：47 / 51

页数：5

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