Phonon Scattering of Composite Fermions

Abstract

We study the principal aspects of the interaction between acoustic phonons and two-dimensional electrons in quantizing magnetic fields corresponding to even denominator fractions. Using the composite fermion approach we derive the vertex of the electron-phonon coupling mediated by the Chern-Simons gauge field. We estimate acoustic phonon contribution to electronic mobility, phonon-drag thermopower, and hot electron energy loss rate, which all, depending on the temperature regime, are either proportional to lower powers of T than their zero field counterparts, or enhanced by the same numerical factor as the coefficient of surface acoustic wave attenuation.

13 pages, Latex file, Nordita report, Dec.1996

References in corpus (4)

• Phonon Emission from a 2D Electron Gas: Evidence of Transition to the Hydrodynamic Regime
• Logarithmic temperature dependence of conductivity at half-integer filling factors: Evidence for interaction between composite fermions
• Surface acoustic wave attenuation by a two-dimensional electron gas in a strong magnetic field
• Logarithmic Temperature Dependence of Conductivity at Half Filled Landau Level