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Enhanced quantum oscillatory magnetization and nonequilibrium currents in an interacting two-dimensional electron system in MgZnO/ZnO with repulsive scatterers Link: Autor/in: Erscheinungsjahr: 2014 Medientyp: Text Beschreibung: 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. © 2014 American Physical Society. Lizenz: info:eu-repo/semantics/restrictedAccess Quellsystem: Forschungsinformationssystem der UHH Interne Metadaten Quelldatensatz oai:www.edit.fis.uni-hamburg.de:publications/596b1da0-91d4-45e2-9d6a-971e2e386a39