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Enhanced quantum oscillatory magnetization and nonequilibrium currents in an interacting two-dimensional electron system in MgZnO/ZnO with repulsive scatterers

Brasse, M. and Sauther, S. M. and Falson, J. and Kozuka, Y. and Tsukazaki, A. and Heyn, Ch. and Wilde, M. A. and Kawasaki, M. and Grundler, D. (2014) Enhanced quantum oscillatory magnetization and nonequilibrium currents in an interacting two-dimensional electron system in MgZnO/ZnO with repulsive scatterers. Physical Review B, 89 (7). Art. No. 075307. ISSN 1098-0121. doi:10.1103/physrevb.89.075307. https://resolver.caltech.edu/CaltechAUTHORS:20200403-115230987

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Abstract

Torque magnetometry at low temperature and in high magnetic fields B is performed on MgZnO/ZnO heterostructures incorporating high-mobility two-dimensional electron systems. We find a sawtoothlike quantum oscillatory magnetization M(B), i.e., the de Haas-van Alphen (dHvA) effect. At the same time, nonequilibrium currents and unexpected spikelike overshoots in M are observed which allow us to identify the microscopic nature and density of the residual disorder. The acceptorlike scatterers give rise to a magnetic thaw down effect which enhances the dHvA amplitude beyond the electron-electron interaction effects being present in the MgZnO/ZnO heterostructures.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/physrevb.89.075307DOIArticle
https://arxiv.org/abs/1307.3504arXivDiscussion Paper
ORCID:
AuthorORCID
Falson, J.0000-0003-3183-9864
Kozuka, Y.0000-0001-7674-600X
Tsukazaki, A.0000-0003-0251-063X
Kawasaki, M.0000-0001-6397-4812
Alternate Title:Enhanced quantum oscillatory magnetization and non-equilibrium currents in an interacting two-dimensional electron system in MgZnO/ZnO with repulsive scatterers
Additional Information:© 2014 American Physical Society. (Received 15 July 2013; published 18 February 2014) We acknowledge financial support from the Deutsche Forschungsgemeinschaft via TRR80. This work was partly supported by Grant-in-Aids for Scientific Research (S) No. 24226002 from MEXT, Japan, as well as by the Murata Science Foundation (Y.K.).
Funders:
Funding AgencyGrant Number
Deutsche Forschungsgemeinschaft (DFG)TRR80
Japan Society for the Promotion of Science (JSPS)24226002
Murata Science FoundationUNSPECIFIED
Issue or Number:7
Classification Code:PACS number(s): 71.18.+y, 77.55.hf, 71.70.−d
DOI:10.1103/physrevb.89.075307
Record Number:CaltechAUTHORS:20200403-115230987
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200403-115230987
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102318
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:03 Apr 2020 22:27
Last Modified:16 Nov 2021 18:11

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