Excessive noise as a test for many-body localization

I. Tamir, T. Levinson, F. Gorniaczyk, A. Doron, J. Lieb, and D. Shahar
Phys. Rev. B 99, 035135 – Published 18 January 2019
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Abstract

Recent experimental reports suggested the existence of a finite-temperature insulator in the vicinity of the superconductor-insulator transition. The rapid decay of conductivity over a narrow temperature range was theoretically linked to both a finite-temperature transition to a many-body-localized state, and to a charge-Berezinskii-Kosterlitz-Thouless transition. Here we report of low-frequency noise measurements of such insulators to test for many-body localization. We observed a huge enhancement of the low-temperatures noise when exceeding a threshold voltage for nonlinear conductivity and discuss our results in light of the theoretical models.

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  • Received 25 June 2018
  • Revised 1 November 2018

DOI:https://doi.org/10.1103/PhysRevB.99.035135

©2019 American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

I. Tamir1,2,*, T. Levinson1, F. Gorniaczyk1, A. Doron1, J. Lieb1, and D. Shahar1,3

  • 1Department of Condensed Matter Physics, The Weizmann Institute of Science, Rehovot 76100, Israel
  • 2Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany
  • 3Department of Physics, Columbia University, New York, New York 10027, USA

  • *Corresponding author: idan.tamir@fu-berlin.de

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Issue

Vol. 99, Iss. 3 — 15 January 2019

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