Diffusion Thermopower at Even Denominator Fractions

Abstract

We compute the electron diffusion thermopower at compressible Quantum Hall states corresponding to even denominator fractions in the framework of the composite fermion approach. It is shown that the deviation from the linear low temperature behavior of the termopower is dominated by the logarithmic temperature corrections to the conductivity and not to the thermoelectric coefficient, although such terms are present in both quantities. The enhanced magnitude of this effect compared to the zero field case may allow its observation with the existing experimental techniques.

Latex, 12 pages, Nordita report

References in corpus (4)

• Localization of Charged Quantum Particles in a Static Random Magnetic Field
• Magnetoresistance of Two-Dimensional Fermions in a Random Magnetic Field
• Logarithmic temperature dependence of conductivity at half-integer filling factors: Evidence for interaction between composite fermions
• Logarithmic Temperature Dependence of Conductivity at Half Filled Landau Level

Cited by in corpus (2)

• Thermopower as a Possible Probe of Non-Abelian Quasiparticle Statistics in Fractional Quantum Hall Liquids
• Low-field diffusion magneto-thermopower of a high mobility two-dimensional electron gas