Temperature and field dependence of Dynamics in the Electron-Glass

Details Temperature and field dependence of Dynamics in the Electron-Glass Temperature and field dependence of Dynamics in the Electron-Glass

2006-10-31

arxiv.org/abs/cond-mat/0610859v1

Phys. Rev. B 73, 214208 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

Scientific paper

10.1103/PhysRevB.73.214208

We describe several experimental methods to quantify dynamics in electron glasses and illustrate their use in the glassy phase of crystalline indium-oxide films. These methods are applied to study the dependence of dynamics on temperature and on non-ohmic electric fields at liquid helium temperatures. It is shown that over a certain range of temperature the dynamics becomes slower with temperature or upon increasing an applied non-ohmic field, a behavior suggestive of a quantum-glass. It is demonstrated that non-ohmic fields produce qualitatively similar results as raising the system temperature. Quantitatively however, their effect may differ marekdly. The experimental advantages of using fields to mimic higher temperature are pointed out and illustrated.

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