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Title: Volume-wise destruction of the antiferromagnetic Mott insulating state through quantum tuning

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms12519· OSTI ID:1303008
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  1. Columbia Univ., New York, NY (United States)
  2. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  3. McMaster Univ., Hamilton, ON (Canada)
  4. McMaster Univ., Hamilton, ON (Canada); Canadian Inst. for Advanced Research, Toronto (Canada)
  5. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics
  6. Zhejiang Univ., Hangzhou (China)
  7. Japan Atomic Energy Agency (JAEA), Tokai (Japan). Advanced Science Research Center
  8. Brookhaven National Lab. (BNL), Upton, NY (United States)
  9. Univ. of Tokyo (Japan)
  10. Kyoto Univ. (Japan)
  11. Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain). Inst. de Ciencia de Materiales de Madrid, Cantoblanco
  12. Brookhaven National Lab. (BNL), Upton, NY (United States); Rutgers Univ., Piscataway, NJ (United States)

RENiO3 (RE=rare-earth element) and V2O3 are archetypal Mott insulator systems. When tuned by chemical substitution (RENiO3) or pressure (V2O3), they exhibit a quantum phase transition (QPT) between an antiferromagnetic Mott insulating state and a paramagnetic metallic state. Because novel physics often appears near a Mott QPT, the details of this transition, such as whether it is first or second order, are important. Here, we demonstrate through muon spin relaxation/rotation (μSR) experiments that the QPT in RENiO3 and V2O3 is first order: the magnetically ordered volume fraction decreases to zero at the QPT, resulting in a broad region of intrinsic phase separation, while the ordered magnetic moment retains its full value until it is suddenly destroyed at the QPT. These findings bring to light a surprising universality of the pressure-driven Mott transition, revealing the importance of phase separation and calling for further investigation into the nature of quantum fluctuations underlying the transition.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704
OSTI ID:
1303008
Report Number(s):
BNL-112476-2016-JA; R&D Project: PO011; KC0201060
Journal Information:
Nature Communications, Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (3)

Restoration of quantum critical behavior by disorder in pressure-tuned (Mn,Fe)Si journal August 2017
Distortion mode anomalies in bulk PrNiO 3 : Illustrating the potential of symmetry-adapted distortion mode analysis for the study of phase transitions journal November 2019
Restoration of quantum critical behavior by disorder in pressure-tuned (Mn,Fe)Si text January 2017