Enhanced quantum oscillatory magnetization and nonequilibrium currents in an interacting two-dimensional electron system in MgZnO/ZnO with repulsive scatterers
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.
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.).Attached Files
Published - PhysRevB.89.075307.pdf
Submitted - 1307.3504.pdf
Supplemental Material - SupplMaterial_PRLv3.pdf
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Additional details
- Alternative title
- Enhanced quantum oscillatory magnetization and non-equilibrium currents in an interacting two-dimensional electron system in MgZnO/ZnO with repulsive scatterers
- Eprint ID
- 102318
- Resolver ID
- CaltechAUTHORS:20200403-115230987
- TRR80
- Deutsche Forschungsgemeinschaft (DFG)
- 24226002
- Japan Society for the Promotion of Science (JSPS)
- Murata Science Foundation
- Created
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2020-04-03Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field