2009
DOI: 10.1103/physrevlett.102.176803
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Jumps in Current-Voltage Characteristics in Disordered Films

Abstract: We argue that giant jumps of current at finite voltages observed in disordered films of InO, TiN, and YSi manifest a bistability caused by the overheating of electrons. One of the stable states is overheated and thus low resistive, while the other, high-resistive state is heated much less by the same voltage. The bistability occurs provided that cooling of electrons is inefficient and the temperature dependence of the equilibrium resistance R(T) is steep enough. We use experimental R(T) and assume phonon mecha… Show more

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Cited by 93 publications
(143 citation statements)
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“…In the case described in [15][16] this is the superconductor -insulator transition near the critical temperature. In Ref.…”
Section: Suchmentioning
confidence: 99%
“…In the case described in [15][16] this is the superconductor -insulator transition near the critical temperature. In Ref.…”
Section: Suchmentioning
confidence: 99%
“…However the approximation of the effective temperature allows one to solve the problem in an analytical form. In the limit of high impurity concentration (l < s/T ), the inelastic electron-phonon scattering rate τ −1 e−ph depends on energy even stronger [29,37,38,39], that is, the window between τ −1 e−e and τ −1 e−ph becomes larger and the situation is even more favorable for applicability of our approach. If the frequency ǫ 0 / is less than τ −1 e−ph , then the heat absorbed by quasiparticles in the superconductor is released mainly to the lattice, but not to the normal electrodes, and our approach is not applicable.…”
Section: High Interface Resistance Non-homogeneous Casementioning
confidence: 99%
“…Due to a high rate of the electron-electron collisions one can assume that the distribution function f + has an equilibrium form, f + (ǫ) = tanh(ǫβ), with an effective temperature T ≡ (2β) −1 depending on the coordinate x. Perhaps for the first time, the approximation of the effective temperature has been introduced in the study of nonequilibrium superconductors by Parker [40] (see also [29,31,44]). In order to find this temperature, we multiply Eq.…”
Section: High Interface Resistance Non-homogeneous Casementioning
confidence: 99%
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