Direct measurement of the g factor of composite fermions.
نویسندگان
چکیده
The activation gap Delta of the fractional quantum Hall states at constant fillings nu=2/3 and 2/5 has been measured as a function of the perpendicular magnetic field B. A linear dependence of Delta on B is observed while approaching the spin-polarization transition. This feature allows a direct measurement of the g factor of composite fermions which appears to be heavily renormalized by interactions and strongly sensitive to the electronic filling factor.
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عنوان ژورنال:
- Physical review letters
دوره 92 15 شماره
صفحات -
تاریخ انتشار 2004