Publication Date:
2014-12-03
Description:
Author(s): D. Kamburov, M. A. Mueed, I. Jo, Yang Liu, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin, J. J. D. Lee, and R. Winkler In the composite fermions (CF) framework, at filling factor ν = 3/2 each carrier pairs up with two flux quanta to form quasi particles. The flux attachment cancels the external field, leaving the CFs as if they are at zero field — they occupy a Fermi sea with a well-defined Fermi contour. To examine this contour and its anisotropy induced by in-plane magnetic field, the authors apply the method of periodic grating of Hall bar samples, previously used by them in studies of CF near the filling factor 1/2. It is found that CF spin polarization increases with increasing quantum well width and electron density, and that in-plane magnetic field induces a larger CF Fermi contour anisotropy near filling factor 3/2 than near 1/2. [Phys. Rev. B 90, 235108] Published Tue Dec 02, 2014
Keywords:
Electronic structure and strongly correlated systems
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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