Gap Evolution in ν = 1/2 Bilayer Quantum Hall Systems

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Author(s)

Abstract

Fractional quantum Hall states in bilayer systems at the total filling fraction ν = 1/2 are examined numerically within some ranges of layer separation and interlayer tunneling. It is shown that the ground state changes continuously from a two-component state to a one-component state as the interlayer tunneling rate is increased, while the lowest excited state changes discontinuously. This fact explains the unusual behavior of the observed activation energies which reveals an upward cusp as a function of interlayer tunneling. Some trial wave functions for the ground state and quasihole excited states are inspected.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 73(10), 2612-2615, 2004-10-15

    The Physical Society of Japan (JPS)

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Codes

  • NII Article ID (NAID)
    110001979175
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    SHO
  • ISSN
    00319015
  • NDL Article ID
    7120788
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  NDL  NII-ELS 
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