Schulze-Wischeler F, Mariani E, Hohls F, Haug RJ. Direct measurement of the g factor of composite fermions.
PHYSICAL REVIEW LETTERS 2004;
92:156401. [PMID:
15169302 DOI:
10.1103/physrevlett.92.156401]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2003] [Indexed: 05/24/2023]
Abstract
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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