Metamorphosis of a Quantum Hall Bilayer State into a Composite Fermion Metal
arXiv:cond-mat/0702317 · doi:10.1016/j.ssc.2007.07.005
Abstract
Composite fermion metal states emerge in quantum Hall bilayers at total Landau level filling factor =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.
arXiv comment4 pages 4 figures
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