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Discovery of quantum phases in the Shastry-Sutherland compound SrCu2(BO3)2 under extreme conditions of field and pressure

Journal Article · · Nature Communications
 [1];  [2];  [3];  [2];  [4];  [5];  [6];  [5];  [7];  [2]
  1. Duke University, Durham, NC (United States); OSTI
  2. Duke University, Durham, NC (United States)
  3. University of Amsterdam (Netherlands)
  4. Florida State University, Tallahassee, FL (United States)
  5. California Institute of Technology (CalTech), Pasadena, CA (United States)
  6. McMaster University, Hamilton, ON (Canada)
  7. Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland)
+ Show Author Affiliations
The 2-dimensional layered oxide material SrCu2(BO3)2, long studied as a realization of the Shastry-Sutherland spin topology, exhibits a range of intriguing physics as a function of both hydrostatic pressure and magnetic field, with a still debated intermediate plaquette phase appearing at approximately 20 kbar and a possible deconfined critical point at higher pressure. Here, we employ a tunnel diode oscillator (TDO) technique to probe the behavior in the combined extreme conditions of high pressure, high magnetic field, and low temperature. We reveal an extensive phase space consisting of multiple magnetic analogs of the elusive supersolid phase and a magnetization plateau. In particular, a 10 x 2 supersolid and a 1/5 plateau, identified by infinite Projected Entangled Pair States (iPEPS) calculations, are found to rely on the presence of both magnetic and non-magnetic particles in the sea of dimer singlets. These states are best understood as descendants of the full-plaquette phase, the leading candidate for the intermediate phase of SrCu2(BO3)2
Research Organization:
California Institute of Technology (CalTech), Pasadena, CA (United States); Duke University, Durham, NC (United States)
Sponsoring Organization:
Duke University; European Research Council (ERC); National Science Foundation (NSF); State of Florida; Swiss National Science Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0014866
OSTI ID:
1904438
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 13; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
critical phenomena
magnetic materials
magnetic properties
phase transition