Volume-wise destruction of the antiferromagnetic Mott insulating state through quantum tuning
- Columbia Univ., New York, NY (United States)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland)
- McMaster Univ., Hamilton, ON (Canada)
- McMaster Univ., Hamilton, ON (Canada); Canadian Inst. for Advanced Research, Toronto (Canada)
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics
- Zhejiang Univ., Hangzhou (China)
- Japan Atomic Energy Agency (JAEA), Tokai (Japan). Advanced Science Research Center
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Univ. of Tokyo (Japan)
- Kyoto Univ. (Japan)
- Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain). Inst. de Ciencia de Materiales de Madrid, Cantoblanco
- 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
Web of Science
Restoration of quantum critical behavior by disorder in pressure-tuned (Mn,Fe)Si
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journal | August 2017 |
Distortion mode anomalies in bulk : Illustrating the potential of symmetry-adapted distortion mode analysis for the study of phase transitions
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journal | November 2019 |
Restoration of quantum critical behavior by disorder in pressure-tuned (Mn,Fe)Si
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text | January 2017 |
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