Metamorphosis of a Quantum Hall Bilayer State into a Composite Fermion Metal

Details Metamorphosis of a Quantum Hall Bilayer State into a Composite Fermion Metal Metamorphosis of a Quantum Hall Bilayer State into a Composite Fermion Metal

2007-02-13

arxiv.org/abs/cond-mat/0702317v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages 4 figures

Scientific paper

10.1016/j.ssc.2007.07.005

Composite fermion metal states emerge in quantum Hall bilayers at total Landau level filling factor $\nu_T$=1 when the tunneling gap collapses by application of in-plane components of the external magnetic field. Evidence of this transformation is found in the continua of spin excitations observed by inelastic light scattering below the spin-wave mode at the Zeeman energy. The low-lying spin modes are interpreted as quasiparticle excitations with simultaneous changes in spin orientation and composite fermion Landau level index.

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