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Title: Particle-hole symmetry reveals failed superconductivity in the metallic phase of two-dimensional superconducting films

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [2]
  1. Stanford Univ., CA (United States). Dept. of Applied Physics; Harvey Mudd College, Claremont, CA (United States). Dept. of Physics
  2. Stanford Univ., CA (United States). Dept. of Applied Physics; Stanford Univ., CA (United States). Dept. of Physics

Electrons confined to two dimensions display an unexpected diversity of behaviors as they are cooled to absolute zero. Noninteracting electrons are predicted to eventually “localize” into an insulating ground state, and it has long been supposed that electron correlations stabilize only one other phase: superconductivity. However, many two-dimensional (2D) superconducting materials have shown surprising evidence for metallic behavior, where the electrical resistivity saturates in the zero-temperature limit; the nature of this unexpected metallic state remains under intense scrutiny. We report electrical transport properties for two disordered 2D superconductors, indium oxide and tantalum nitride, and observe a magnetic field–tuned transition from a true superconductor to a metallic phase with saturated resistivity. Lastly, this metallic phase is characterized by a vanishing Hall resistivity, suggesting that it retains particle-hole symmetry from the disrupted superconducting state.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF)
Grant/Contract Number:
AC02-76SF00515; NSF-DMR-9508419
OSTI ID:
1398773
Journal Information:
Science Advances, Vol. 3, Issue 9; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 38 works
Citation information provided by
Web of Science

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Cited By (15)

Structural Dynamics in Thermal Treatment of Amorphous Indium Oxide Films journal September 2019
Anomalous quantum Griffiths singularity in ultrathin crystalline lead films journal August 2019
Superconducting phase transitions in disordered NbTiN films journal January 2020
Theory of the supercyclotron resonance and Hall response in anomalous two-dimensional metals journal June 2018
Colloquium : Anomalous metals: Failed superconductors journal January 2019
Sensitivity of the superconducting state in thin films journal March 2019
Tuning from failed superconductor to failed insulator with magnetic field journal June 2019
Intermediate bosonic metallic state in the superconductor-insulator transition journal November 2019
Dynamical instability of the electric transport in superconductors journal September 2018
Sensitivity of the superconducting state in thin films text January 2019
Structural dynamics in thermal-treatment of amorphous indium-oxide films text January 2020
Magnetic field reveals vanishing Hall response in the normal state of stripe-ordered cuprates journal June 2021
Robust anomalous metallic states and vestiges of self-duality in two-dimensional granular In-InOx composites journal March 2021
Bose Metal as a Disruption of the Berezinskii-Kosterlitz-Thouless Transition in 2D Superconductors text January 2018
Tuning from failed superconductor to failed insulator with magnetic field text January 2018

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