A ug 1 99 6 Quantum corrections to the conductivity of fermion – gauge field models : Application to half filled Landau level and high - T
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چکیده
Quantum corrections to the conductivity of fermion–gauge field models: Application to half filled Landau level and high-T c superconductors. Abstract We calculate the Altshuler-Aronov type quantum correction to the conductivity of 2d charge carriers in a random potential (or random magnetic field) coupled to a transverse gauge field. The gauge fields considered simulate the effect of the Coulomb interaction for the fractional quantum Hall state at half filling and for the t − J model of high-T c superconducting compounds. We find an unusually large quantum correction varying linearly or quadratically with the logarithm of temperature, in different temperature regimes.
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تاریخ انتشار 2008