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Title: Disordered Route to the Coulomb Quantum Spin Liquid: Random Transverse Fields on Spin Ice in Pr 2 Zr 2 O 7

Inelastic neutron scattering reveals a broad continuum of excitations in Pr 2 Zr 2 O 7 , the temperature and magnetic field dependence of which indicate a continuous distribution of quenched transverse fields ( Δ ) acting on the non-Kramers Pr 3 + crystal field ground state doublets. Spin-ice correlations are apparent within 0.2 meV of the Zeeman energy. In a random phase approximation an excellent account of the data is provided and contains a transverse field distribution ρ ( Δ ) ∝ ( Δ 2 + Γ 2 ) - 1 , where Γ = 0.27 ( 1 ) meV . Established during high temperature synthesis due to an underlying structural instability, it appears disorder in Pr 2 Zr 2 O 7 actually induces a quantum spin liquid.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [8] ;  [8] ;  [9]
  1. Johns Hopkins Univ., Baltimore, MD (United States). Inst. for Quantum Matter and Dept. of Physics and Astronomy; Stanford Univ., CA (United States). Dept. of Applied Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences
  2. Johns Hopkins Univ., Baltimore, MD (United States). Inst. for Quantum Matter and Dept. of Physics and Astronomy
  3. Johns Hopkins Univ., Baltimore, MD (United States). Inst. for Quantum Matter and Dept. of Physics and Astronomy; National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). NIST Center for Neutron Research
  4. Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Chemistry
  5. Johns Hopkins Univ., Baltimore, MD (United States). Inst. for Quantum Matter and Dept. of Physics and Astronomy and Dept. of Chemistry and Dept. of Materials Science and Engineering
  6. Univ. of Tokyo (Japan). Inst. for Solid State Physics (ISSP); Osaka Univ. (Japan). Division of Materials Physics
  7. Univ. of Tokyo (Japan). Inst. for Solid State Physics (ISSP); Japan Science and Technology Agency (JST), Saitama (Japan). CREST
  8. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). NIST Center for Neutron Research
  9. Johns Hopkins Univ., Baltimore, MD (United States). Inst. for Quantum Matter and Dept. of Physics and Astronomy and Dept. of Materials Science and Engineering; National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). NIST Center for Neutron Research
Publication Date:
Grant/Contract Number:
FG02-08ER46544; AC02-76SF00515; 16H02209; 15H05882; 15H05883; DMR-1508249; R2604
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 10; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); Japan Science and Technology Agency; Japanese Society for the Promotion of Science
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1352645
Alternate Identifier(s):
OSTI ID: 1346272