Berg, A. and Weiss, Dieter and Klitzing, Klaus von and Nötzel, R. (1993) Spin-Splitting in a Two-Dimensional Electron System Determined by Nuclear Magnetic Relaxation and Magnetotransport Activation Measurements. International Journal of Modern Physics B 7, pp. 474-479.
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The spin splitting observed in two- dimensional electron systems at high magnetic fields is not only determined by the single-electron Zeeman energy but also by many-particle effects. Electron-electron interaction results in an enhanced g-factor which can be described by the exchange part of the Coulomb interaction. Nuclear spin lattice relaxation experiments analysing the Overhauser Shift in Electron Spin Resonance (ESR) measurements reveal that the exchange term is dominant. The spin splitting is strongly dependent on magnetic field and temperature. Numerical simulations enable the quantitative determination of the exchange part of the spin split energy. Transport activation measurements verify that the exchange part is proportional to the spin polarization of the electrons.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||25 May 2009 15:21|
|Last Modified:||27 Oct 2011 17:12|
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