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

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

…or raise bath-temperature by DT… …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 …

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

… and it becomes small above some f... DG0 DG0 is the same for all f …and F is kept for the same time for all f dGrel is NOT …what determines the cross-over frequency ?

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

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

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