ROOM-TEMPERATURE DETERMINATION OF 2-DIMENSIONAL ELECTRON-GAS CONCENTRATION AND MOBILITY IN HETEROSTRUCTURES

被引：14

作者：

SCHACHAM, SE

MENA, RA

HAUGLAND, EJ

ALTEROVITZ, SA

机构：

[1] National Aeronautics and Space Administration, Lewis Research Center, Cleveland

来源：

APPLIED PHYSICS LETTERS | 1993年 / 62卷 / 11期

关键词：

D O I：

10.1063/1.108708

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A technique for determination of room-temperature two-dimensional electron gas (2DEG) concentration and mobility in heterostructures is presented. Using simultaneous fits of the longitudinal and transverse voltages as a function of applied magnetic field, we were able to separate the parameters associated with the 2DEG from those of the parallel layer. Comparison with the Shubnikov-de Haas data derived from measurements at liquid helium temperatures proves that the analysis of the room-temperature data provides an excellent estimate of the 2DEG concentration. In addition we were able to obtain for the first time the room-temperature mobility of the 2DEG, an important parameter to device application. Both results are significantly different from those derived from conventional Hall analysis.

引用

页码：1283 / 1285

页数：3

共 5 条

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