Spin-dependent exchange and correlation effects on the orbital magnetization of two-dimensional electron systems

We have investigated the orbital magnetization of tunable two-dimensional electron-systems (2DES) in GaAs/AIGaAs-heterostructures in the magnetic quantum limit using a high-sensitive superconducting susceptometer. In particular we have studied the magnetization at filling factor ν=1, where the 2DES forms the quantum Hall ferromagnet. We extract from our data that the orbital magnetic moment is strongly enhanced at low temperatures T by spin-dependent exchange effects. Temperature dependent measurements show that in addition correlation effects dominate the excited states of the many-body system.


Published in:
Physica E: Low-dimensional Systems and Nanostructures, 6, 1-4, 731-734
Year:
2000
Publisher:
Elsevier
ISSN:
1386-9477
Laboratories:




 Record created 2015-07-08, last modified 2018-03-17


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