HIGH-FIELD MAGNETORESISTANCE IN A PERIODICALLY MODULATED 2-DIMENSIONAL ELECTRON-GAS

A. K. Geim, Rafael J. Taboryski, A. Kristensen, S. V. Dubonos, P. E. Lindelof

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We have extended earlier measurements of the magnetoresistance in a periodically modulated two-dimensional electron gas to high magnetic fields, where the cyclotron radius, r(c), is much smaller than the period, a, of modulation. A giant nonoscillatory magnetoresistance was found to arise beyond the range of low-field (Weiss) oscillations periodic in 1/B. Its value in a magnetic field of a few tesla may exceed the zero-field resistance value, rho-0, by 1 to 2 orders of magnitude. This result is in agreement with the semiclassical theory by Beenakker, if a modulation of the electron mobility is taken into account.
Original languageEnglish
JournalPhysical Review B
Volume46
Issue number7
Pages (from-to)4324-4327
ISSN2469-9950
Publication statusPublished - 1992
Externally publishedYes

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