Frictional drag between coupled two-dimensional hole gases in heterostructures

C. Jörger, Shun-Jen Cheng, H. Rubel, W. Dietsche, R. Gerhardts, P. Specht, K. Eberl, K. Klitzing

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

We report on measurements of the drag effect between coupled two-dimensional hole gases. We investigate the coupling by changing the carrier densities in the quantum wells, the widths of the barriers between the gases, and the perpendicular magnetic field. We make use of the nonparabolicity of the hole-dispersion curves to tune the Fermi wave vector and the Fermi velocity separately. With this technique we find that the frictional drag is mainly due to phonon coupling.

Original languageEnglish
Pages (from-to)1572-1575
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number3
DOIs
StatePublished - 1 Jan 2000

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