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Quantum meets classical phase transition: Low-temperature anomaly in disordered superconductors near $B_{c2}$

Autor: Sacépé, B., Seidemann, J., Gay, F., Davenport, K., Rogachev, A., Ovadia, M., Michaeli, K., Feigel'man, M. V.

Publikováno v: Nature Physics 15, 48 (2019)

Strongly disordered superconductors in a magnetic field display many characteristic properties of type-II superconductivity--- except at low temperatures where an anomalous linear $T$-dependence of the resistive critical field $B_{c2}$ is routinely o

Externí odkaz: http://arxiv.org/abs/1609.07105

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High field termination of a Cooper-pair insulator

Autor: Sacepe, B., Seidemann, J., Ovadia, M., Tamir, I., Shahar, D., Chapelier, C., Strunk, C., Piot, B. A.

Publikováno v: Phys. Rev. B 91, 220508(R) (2015)

We conducted a systematic study of the disorder dependence of the termination of superconductivity, at high magnetic fields (B), of amorphous indium oxide films. Our lower disorder films show conventional behavior where superconductivity is terminate

Externí odkaz: http://arxiv.org/abs/1504.00528

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Evidence for a Finite Temperature Insulator

Autor: Ovadia, M., Kalok, D., Tamir, I., Mitra, S., Sacepe, B., Shahar, D.

Publikováno v: Scientific Reports 5, Article number: 13503 (2015)

In superconductors the zero-resistance current-flow is protected from dissipation at finite temperatures (T) by virtue of the short-circuit condition maintained by the electrons that remain in the condensed state. The recently suggested finite-T insu

Externí odkaz: http://arxiv.org/abs/1406.7510

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Electric breakdown effect in the current-voltage characteristics of amorphous indium oxide thin films near the superconductor-insulator transition

Autor: Cohen, O., Ovadia, M., Shahar, D.

Publikováno v: Phys. Rev. B 84, 100507(R) (2011)

Current-voltage characteristics in the insulator bordering superconductivity in disordered thin films exhibit current jumps of several orders of magnitude due to the development of a thermally bistable electronic state at very low temperatures. In th

Externí odkaz: http://arxiv.org/abs/1109.4406

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Localization of preformed Cooper-pairs in disordered superconductors

Autor: Sacepe, B., Dubouchet, T., Chapelier, C., Sanquer, M., Ovadia, M., Shahar, D., Feigel'man, M., Ioffe, L.

Publikováno v: Nature Physics 7, 239 (2011)

The most profound effect of disorder on electronic systems is the localization of the electrons transforming an otherwise metallic system into an insulator. If the metal is also a superconductor then, at low temperatures, disorder can induce a dramat

Externí odkaz: http://arxiv.org/abs/1012.3630

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