Determination of the phase of magneto-intersubband scattering oscillations in heterojunctions and quantum wells

被引：71

作者：

Sander, TH

Holmes, SN

Harris, JJ

Maude, DK

Portal, JC

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Interdisciplinary Res Ctr Semicond Mat, London SW7 2BZ, England

[2] CNRS, Lab Champs Magnet Intenses, F-38042 Grenoble, France

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.58.13856

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oscillatory magnetoresistance of a two-dimensional electron system with two occupied subbands has been studied in an Al0.3Ga0.7As/GaAs heterojunction and an Al0.3Ga0.7As/In0.15Ga0.85As/GaAs quantum well between 4 and 100 It. As a consequence of the second populated subband, a magneto-intersubband scattering effect is observed at low-magnetic fields in addition to the Shubnikov-de Hails effect. Due to the different temperature damping of the two effects, the oscillatory magnetoresistance can exhibit both effects simultaneously at high and respectively low fields. Using the extrema positions, it is possible to clearly identify a theoretically predicted phase difference between the Shubnikov-de Haas and the magneto-intersubband scattering oscillations at temperatures higher than 4 K. This phase difference influences the power spectrum of reciprocal-field magnetoresistance data. [S0163-1829(98)04444-0].

引用

页码：13856 / 13862

页数：7

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