Status of the Fermi surface in mixed composite boson - composite fermion quantum Hall states

Details Status of the Fermi surface in mixed composite boson - composite fermion quantum Hall states Status of the Fermi surface in mixed composite boson - composite fermion quantum Hall states

2004-05-24

arxiv.org/abs/cond-mat/0405554v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures

Scientific paper

10.1103/PhysRevB.70.085307

We argue that the naively expected singularities of the Fermi surface, in the mixed composite boson - composite fermion states proposed [S.H. Simon et al., PRL 91, 046803(2003)] for the evolution of \nu = 1 bilayer quantum Hall system with distance, are obliterated. Our conclusion is based on a careful analysis of the momentum distribution in \nu = 1/2 single-layer composite-fermion state. We point out to a possibility of the phenomenon hitherto unknown outside Kondo lattice systems when, in a translationally invariant system, Fermi-liquid-like portion of electrons enlarges its volume.

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