Fuhrer, A. and Lüscher, S. and Ihn, Thomas and Heinzel, Thomas and Ensslin, Klaus and Wegscheider, Werner and Bichler, Max (2001) Energy spectra of quantum rings. Nature 413, pp. 822-825.
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Experiments on a nearly spin degenerate two-dimensional electron system reveals unusual hysteretic and relaxational transport in the fractional quantum Hall effect (FQHE) regime. The magnetotransport near the transition between the spin-polarized and spin-unpolarized Image states is accompanied by a complicated series of hysteresis loops reminiscent of a classical ferromagnet. In conjunction with the hysteresis, magnetoresistance can either grow or decay logarithmically in time with remarkable persistence without saturation. These results can be understood in terms of anomalous domain dynamics associated with the spin transition or alternatively in terms of quantum Hall ferromagnet.
|Date:||25 October 2001|
|Institutions:||Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider|
|Keywords:||Magnetic field; Semiconductors; Fractional quantum Hall effect|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||30 Nov 2009 14:10|
|Last Modified:||20 Jul 2011 22:10|