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Dissipative effects in the electron glass relaxation dynamics of a quantum glass

Dissipative effects in the electron glass relaxation dynamics of a quantum glass. M. Pollak (UCR) A. Efros (Utah). M. Ben-Chorin (HU) V. Savateev (HU) A. Vaknin (HU) V. Orlyanchik (HU). …slow relaxation…. Robertson and Wilkes, Polymer, 42, 1581 (2001). … quench the sample from high T ….

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Dissipative effects in the electron glass relaxation dynamics of a quantum glass

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  1. Dissipative effects in the electron glassrelaxation dynamics of a quantum glass M. Pollak (UCR)A. Efros (Utah) M. Ben-Chorin (HU) V. Savateev (HU) A. Vaknin (HU) V. Orlyanchik (HU)

  2. …slow relaxation… Robertson and Wilkes, Polymer, 42, 1581 (2001) …quench the sample from high T… In2O3-x The basic phenomena Samples are thin films of crystalline or amorphousindium-oxide, disorder-tuned to be in the hopping regime unless otherwise noted:T»4K

  3. …apply large source-drain field… …change gate voltage… indium-oxide film Sio2 cover-glass Gold film …or raise temperature… …more ways to get it out of equilibrium...

  4. …just like changing gate voltage… …not all photons are born equal… …zap it with light… …one more way to get it out of equilibrium...electromagnetic radiation

  5. PRL, 92, 066801 (2004) “F-protocol” PRL, 84, 3402 (2000) PRB, 73, 214204 (2006) “Vg-protocol” “T-protocol” Memory effects …aging…

  6. indium-oxide film Sio2 cover-glass Gold film Fixed disorder Varying the temperature… Fixed T (=4.1K) Varying the disorder…

  7. Dynamics Rheinstadter et al, PRB 69, 144427 (2004) Structural Glass 30K 30K 28K Electron Glass

  8. Dynamics Rheinstadter et al, PRB 69, 144427 (2004) Structural Glass 30K 30K 28K Electron Glass

  9. Dynamics – how is measured …one way to estimatet... G* t amorphous indium-oxide[PRL, 81, 669 (1998)]All samples with SIMILAR resistance The Two-Dip Experiment

  10. Dynamics – measured differently …as function of temperature…

  11. Dynamics …as function of n…

  12. The relaxation rate of the electron glass is: Either T independent or it slows down with T(in contrast with classical glasses) T dependence diminishes with G* (determined by n) AOTBE – the larger G* is, the slower is the relaxation rate

  13. …off the record…

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