Room-temperature determination of two-dimensional electron gas concentration and mobility in heterostructures

S. E. Schacham; R. A. Mena; E. J. Haugland; S. A. Alterovitz

doi:10.1063/1.108708

Room-temperature determination of two-dimensional electron gas concentration and mobility in heterostructures

S. E. Schacham, R. A. Mena, E. J. Haugland, S. A. Alterovitz

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Abstract

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.

Original language	English
Pages (from-to)	1283-1285
Number of pages	3
Journal	Applied Physics Letters
Volume	62
Issue number	11
DOIs	https://doi.org/10.1063/1.108708
State	Published - 1993
Externally published	Yes

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title = "Room-temperature determination of two-dimensional electron gas concentration and mobility in heterostructures",

abstract = "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.",

author = "Schacham, {S. E.} and Mena, {R. A.} and Haugland, {E. J.} and Alterovitz, {S. A.}",

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AU - Schacham, S. E.

AU - Mena, R. A.

AU - Haugland, E. J.

AU - Alterovitz, S. A.

PY - 1993

Y1 - 1993

N2 - 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.

AB - 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.

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Room-temperature determination of two-dimensional electron gas concentration and mobility in heterostructures

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