Effects of substrate orientation, pseudomorphic growth and superlattice on alloy scattering in modulation doped GaInAs


Journal Article

The possibility of reducing alloy scattering in MBE Ga1-xInxAs has been studied experimentally by growing modulation doped heterostructures (A) with an InAs/GaInAs superlattice 2DEG channel, (B) on a vicinal (110) InP substrate, and (C) with a strain compensated pseudomorphic channel. The maximum 77 K mobility obtained in each case is (A) 60,600, (B) 69,300, and (C) 123,100 cm2/V⋯s, using x=0.50, 0.53, and 0.80, respectively. Partial alloy ordering is observed in case (B). Cyclotron resonance measurements indicate that the reduction of m* contributes much less to the enhancement of mobility in case (C) than the alloy composition factor x(1-x). Alloy ordering may also be important. © 1991.

Full Text

Duke Authors

Cited Authors

  • Chin, A; Chang, TY; Ourmazd, A; Monberg, EM; Chang, AM; Kurdak, C

Published Date

  • May 2, 1991

Published In

Volume / Issue

  • 111 / 1-4

Start / End Page

  • 466 - 469

International Standard Serial Number (ISSN)

  • 0022-0248

Digital Object Identifier (DOI)

  • 10.1016/0022-0248(91)91021-2

Citation Source

  • Scopus