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Physical review. B, 2016-11, Vol.94 (17), Article 174204
2016
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Details

Autor(en) / Beteiligte
Titel
Direct determination of the temperature of overheated electrons in an insulator
Ist Teil von
  • Physical review. B, 2016-11, Vol.94 (17), Article 174204
Ort / Verlag
College Park: American Physical Society
Erscheinungsjahr
2016
Quelle
American Physical Society Journals
Beschreibungen/Notizen
  • Highly disordered superconductors, in the magnetic-field-driven insulating state, can show discontinuous current-voltage characteristics. Electron overheating has been shown to give a consistent description of this behavior, but there are other possible explanations, including an electric-field-induced breakdown of the insulating state and a novel “superinsulating” state. We present ac-dc crossed measurements, in which the application of a dc voltage is applied along our sample, while a small ac voltage is applied in the transverse direction. We varied the dc voltage and observed a simultaneous discontinuity in both ac and dc currents. We show that the inferred electron temperature in the transverse measurement matches that in the longitudinal one, strongly supporting electron overheating as the source of observed current-voltage characteristics. Our measurement technique may be applicable as a method of probing electron overheating in various other physical systems, which show discontinuous or nonlinear current-voltage characteristics.
Sprache
Englisch
Identifikatoren
ISSN: 2469-9950
eISSN: 2469-9969
DOI: 10.1103/PhysRevB.94.174204
Titel-ID: cdi_proquest_journals_2126558524

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