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On the nature of the Fractional Quantum Hall Effect ground state at low fillings
Author(s) -
Claro F.
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200404866
Subject(s) - quantum hall effect , fractional quantum hall effect , condensed matter physics , wigner crystal , landau quantization , charge density wave , ground state , physics , charge (physics) , quantum spin hall effect , quantum mechanics , filling factor , state (computer science) , quantum , electron , mathematics , superconductivity , algorithm
We propose that the fractional quantum Hall effect structures recently observed in a narrow low temperature window below filling 1/5 correspond to a charge density wave exhibiting a depinning transition and further gap blurring as the temperature is increased. The main qualitative difference between the usual Wigner crystal and this charge density wave state is that while the former is featureless as the filling of the first Landau level changes, the latter exhibits cusps in the energy at odd fillings, as required by the odd‐denominator rule that characterizes the effect, thus making possible the quantum Hall features. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)