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Quantum Sensing of Insulator‐to‐Metal Transitions in a Mott Insulator

Journal Article · · Advanced Quantum Technologies
 [1];  [1];  [1];  [2];  [3];  [3]
  1. Department of Physics University of California San Diego La Jolla CA 92093 USA
  2. Center for Memory and Recording Research University of California San Diego La Jolla CA 92093 USA
  3. Department of Physics University of California San Diego La Jolla CA 92093 USA, Center for Memory and Recording Research University of California San Diego La Jolla CA 92093 USA
Abstract

Nitrogen vacancy (NV) centers, optically active atomic defects in diamond, have attracted tremendous interest for quantum sensing, network, and computing applications due to their excellent quantum coherence and remarkable versatility in a real, ambient environment. Taking advantage of these strengths, this paper reports on NV‐based local sensing of the electrically driven insulator‐to‐metal transition (IMT) in a proximal Mott insulator. The resistive switching properties of both pristine and ion‐irradiated VO 2 thin film devices are studied by performing optically detected NV electron spin resonance measurements. These measurements probe the local temperature and magnetic field in electrically biased VO 2 devices, which are in agreement with the global transport measurement results. In pristine devices, the electrically driven IMT proceeds through Joule heating up to the transition temperature while in ion‐irradiated devices, the transition occurs nonthermally, well below the transition temperature. The results provide direct evidence for nonthermal electrically induced IMT in a Mott insulator, highlighting the significant opportunities offered by NV quantum sensors in exploring nanoscale thermal and electrical behaviors in Mott materials.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0019273
OSTI ID:
1997917
Alternate ID(s):
OSTI ID: 1852974
Journal Information:
Advanced Quantum Technologies, Journal Name: Advanced Quantum Technologies Journal Issue: 5 Vol. 4; ISSN 2511-9044
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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