Influence of spin on the activation energies at期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Influence of spin on the activation energies at

Authors:	A.F. Dethlefsen E. Mariani W. Wegscheider R.J. Haug

Affiliation:	^aInstitut für Festkörperphysik, Universität Hannover, 30167 Hannover, Germany;^bThe Weizmann Institute of Science, Department of Condensed Matter Physics, 76100 Rehovot, Israel;^cInstitut für Angewandte und Experimentelle Physik, Universität Regensburg, 93040 Regensburg, Germany

Abstract:	The activation energy Δ of the fractional quantum Hall state at constant filling factor and also at and has been measured as a function of the perpendicular magnetic field B while modulating the electron density via a top gate. At small magnetic fields we observe a linear increase of Δ with the magnetic field. The slope of Δ vs. B allows us to directly extract the composite fermion g-factor.

Keywords:	Magneto-transport Fractional quantum Hall effect 2D electron gas Activation energy
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