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Field-enhanced conductivity in Electron-Glasses

disorder. … Coulomb interactions. Field-enhanced conductivity in Electron-Glasses Suppression of Electron-Electron inelastic scattering in Anderson Insulators. Anderson insulator…. e. e. x. x. G(T=0)>0 Metal. G(T=0)=0 Insulator. = E lectron-Glass. … quench the sample from high T ….

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Field-enhanced conductivity in Electron-Glasses

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  1. disorder … Coulomb interactions Field-enhanced conductivity in Electron-Glasses Suppression of Electron-Electron inelastic scattering in Anderson Insulators Anderson insulator… e e x x G(T=0)>0Metal G(T=0)=0Insulator = Electron-Glass

  2. …quench the sample from high T… The basic phenomena allsamples are in the 2D hopping regime …and allare crystalline indium-oxide - In2O3-x …all experiments done at T=4K In2O3-x …slow relaxation… system goes towards lower energy

  3. …more ways to get it out of equilibrium... …apply non-ohmic field F…(high voltage) …or raise bath-temperature by DT… …F and DT have qualitatively similar effect …

  4. … absorption measured via transport... … absorption however, DOES depend on f...

  5. … and it becomes small above some f... DG0 DG0is the samefor allf …and F is keptfor the same time for allf dGrelisNOT …what determines the cross-over frequency ?

  6. …it is the rate of heat removal… T, DT g(T) is the rate heat is removed from the system Celis the electron heat-capacity N(0)=21045 J-1 m-3 V(6.1 MW)=0.3 V (rms) V(12.5 MW)=1 V (rms) g(6.1 MW)=3.5·105 Hz g(12.5 MW)=7.1·105 Hz

  7. …but what about e-e inelastic rate ?! gin (e-e)R(for weak disorder)

  8. …measuring the electron temperature… sample insulator …the “memory-Dip (MD ) gate …MD shape may be used as a thermometer... …applied high frequency F... …applied lowfrequency F...

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