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Title: Field-induced double dome and Bose-Einstein condensation in the crossing quantum spin chain system AgVOAsO 4

Abstract

In this work, we present inelastic neutron-scattering data on the quantum paramagnet AgVOAsO 4 that establish this system as a S = 1 / 2 alternating spin chain compound and provide a direct measurement of the spin gap Δ = 1.2 meV . We also present experimental evidence for two different types of field-induced magnetic order between μ 0 H c 1 = 8.4 T and μ 0 H c 2 = 48.9 T , which may be related to Bose-Einstein condensation (BEC) of triplons. Thermodynamic measurements in magnetic fields up to 60 T and temperatures down to 0.1 K reveal a H - T phase diagram consisting of a dome encapsulating two ordered phases with maximum ordering temperatures of 3.8 and 5.3 K, respectively. In conclusion, this complex phase diagram is not expected for a single- Q BEC system and therefore establishes AgVOAsO 4 as a promising multi- Q BEC candidate capable of hosting exotic vortex phases.

Authors:
ORCiD logo [1];  [2];  [2];  [2];  [3];  [3]; ORCiD logo [4];  [5]; ORCiD logo [4];  [6];  [7];  [7];  [7];  [8]
  1. Florida State Univ., Tallahassee, FL (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Tokyo (Japan)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. GHMFL, Centre National de la Recherche Scientifique (France)
  6. MPI CPfS, Dresden (Germany); Univ. of Central Lancashire, Preston (United Kingdom)
  7. MPI CPfS, Dresden (Germany)
  8. MPI CPfS, Dresden (Germany); Univ. of Augsburg (Germany)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1570639
Report Number(s):
LA-UR-19-21328
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 10; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Weickert, Dagmar Franziska, Aczel, Adam Anthony, Stone, Matthew B., Garlea, V. Ovidiu, Dong, Chao, Kohama, Yoshimitsu, Movshovich, Roman, Demuer, Albin, Harrison, Neil, Gamza, Monika B., Steppke, Alexander, Brando, Manuel, Rosner, Helge, and Tsirlin, Alexander A. Field-induced double dome and Bose-Einstein condensation in the crossing quantum spin chain system AgVOAsO4. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.104422.
Weickert, Dagmar Franziska, Aczel, Adam Anthony, Stone, Matthew B., Garlea, V. Ovidiu, Dong, Chao, Kohama, Yoshimitsu, Movshovich, Roman, Demuer, Albin, Harrison, Neil, Gamza, Monika B., Steppke, Alexander, Brando, Manuel, Rosner, Helge, & Tsirlin, Alexander A. Field-induced double dome and Bose-Einstein condensation in the crossing quantum spin chain system AgVOAsO4. United States. doi:10.1103/PhysRevB.100.104422.
Weickert, Dagmar Franziska, Aczel, Adam Anthony, Stone, Matthew B., Garlea, V. Ovidiu, Dong, Chao, Kohama, Yoshimitsu, Movshovich, Roman, Demuer, Albin, Harrison, Neil, Gamza, Monika B., Steppke, Alexander, Brando, Manuel, Rosner, Helge, and Tsirlin, Alexander A. Tue . "Field-induced double dome and Bose-Einstein condensation in the crossing quantum spin chain system AgVOAsO4". United States. doi:10.1103/PhysRevB.100.104422.
@article{osti_1570639,
title = {Field-induced double dome and Bose-Einstein condensation in the crossing quantum spin chain system AgVOAsO4},
author = {Weickert, Dagmar Franziska and Aczel, Adam Anthony and Stone, Matthew B. and Garlea, V. Ovidiu and Dong, Chao and Kohama, Yoshimitsu and Movshovich, Roman and Demuer, Albin and Harrison, Neil and Gamza, Monika B. and Steppke, Alexander and Brando, Manuel and Rosner, Helge and Tsirlin, Alexander A.},
abstractNote = {In this work, we present inelastic neutron-scattering data on the quantum paramagnet AgVOAsO4 that establish this system as a S=1/2 alternating spin chain compound and provide a direct measurement of the spin gap Δ=1.2meV. We also present experimental evidence for two different types of field-induced magnetic order between μ0Hc1=8.4T and μ0Hc2=48.9T, which may be related to Bose-Einstein condensation (BEC) of triplons. Thermodynamic measurements in magnetic fields up to 60 T and temperatures down to 0.1 K reveal a H-T phase diagram consisting of a dome encapsulating two ordered phases with maximum ordering temperatures of 3.8 and 5.3 K, respectively. In conclusion, this complex phase diagram is not expected for a single-Q→ BEC system and therefore establishes AgVOAsO4 as a promising multi-Q→ BEC candidate capable of hosting exotic vortex phases.},
doi = {10.1103/PhysRevB.100.104422},
journal = {Physical Review B},
number = 10,
volume = 100,
place = {United States},
year = {2019},
month = {9}
}

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