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Direct Measurement of the g-Factor of Composite Fermions
Author(s) -
F. Schulze-Wischeler
Publication year - 2005
Publication title -
aip conference proceedings
Language(s) - English
Resource type - Conference proceedings
SCImago Journal Rank - 0.177
H-Index - 75
eISSN - 1551-7616
pISSN - 0094-243X
DOI - 10.1063/1.1994211
Subject(s) - composite fermion , fermion , filling factor , condensed matter physics , physics , quantum hall effect , composite number , polarization (electrochemistry) , magnetic field , fractional quantum hall effect , perpendicular , materials science , quantum mechanics , quantum spin hall effect , chemistry , composite material , geometry , mathematics
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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