Nonlinear response of a MgZnO/ZnO heterostructure close to zero bias

Q. Shi, J. Falson, M. A. Zudov, Y. Kozuka, A. Tsukazaki, M. Kawasaki, J. Smet

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We report on magnetotransport properties of a MgZnO/ZnO heterostructure subjected to weak direct currents. We find that in the regime of overlapping Landau levels, the differential resistivity acquires a quantum correction proportional to both the square of the current and the Dingle factor. The analysis shows that the correction to the differential resistivity is dominated by a current-induced modification of the electron distribution function and allows us to access both quantum and inelastic scattering rates.

Original languageEnglish (US)
Article number125401
JournalPhysical Review B
Issue number12
StatePublished - Sep 5 2017

Bibliographical note

Funding Information:
We thank I. A. Dmitriev for discussions and P. Herlinger for assistance with the microscope. This work was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Grant No. DE-SC002567 (University of Minnesota) and by Grant-in-Aids for Scientific Research (S) No. 24226002 from MEXT, Japan (University of Tokyo).

Publisher Copyright:
© 2017 American Physical Society.

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