Composite-fermion metals occur in the quantum Hall bilayers at total Landau level filling fraction v(T) = 1 as the tunneling gap Delta(SAS) collapses by application of in-plane magnetic fields. Experimental evidence is obtained from the observation of a spin continuum below the Zeeman energy by resonant inelastic light scattering. These low-lying spin modes are assigned to quasi-particle excitations, where spin and composite-fermion Landau level index change simultaneously. (C) 2007 Elsevier B.V. All rights reserved.
Titolo: | Signatures of composite-fermion metals in electron bilayers at νT=1 |
Autori: | |
Data di pubblicazione: | 2008 |
Rivista: | |
Parole Chiave: | quantum Hall bilayers, composite-fermion metal, phase transition, inelastic light scattering |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.physe.2007.09.204 |
Handle: | http://hdl.handle.net/11384/5177 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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