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Title: Strongly-coupled quantum critical point in an all-in-all-out antiferromagnet

Abstract

Dimensionality and symmetry play deterministic roles in the laws of Nature. They are important tools to characterize and understand quantum phase transitions, especially in the limit of strong correlations between spin, orbit, charge, and structural degrees of freedom. Using newly-developed, high-pressure resonant x-ray magnetic and charge diffraction techniques, we have discovered a quantum critical point in Cd 2Os 2O 7 as the all-in-all-out antiferromagnetic order is continuously suppressed to zero temperature and, concomitantly, the cubic lattice structure continuously changes from space group Fd-3m to F-43m. Surrounded by three phases of different time reversal and spatial inversion symmetries, the quantum critical region anchors two phase lines of opposite curvature, with striking departures from a mean-field form at high pressure. As spin fluctuations, lattice breathing modes, and quasiparticle excitations interact in the quantum critical region, we argue that they present the necessary components for strongly-coupled quantum criticality in this three-dimensional compound.

Authors:
 [1];  [1];  [2];  [3];  [3];  [4];  [5]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States). Division of Physics, Mathematics, and Astronomy
  2. Univ. of Chicago, IL (United States). Department of Physics, The James Franck Institute
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  4. Univ. of Tennessee, Knoxville, TN (United States). Department of Materials Science and Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  5. California Inst. of Technology (CalTech), Pasadena, CA (United States). Division of Physics, Mathematics, and Astronomy; Okinawa Institute of Science and Technology Graduate University, Onna (Japan)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF)
OSTI Identifier:
1465744
Alternate Identifier(s):
OSTI ID: 1474447
Grant/Contract Number:  
AC02-06CH11357; FG02-94ER14466; AC05-00OR22725; DMR-1420709; EAR−1606856; EAR-1634415; DMR-1606858
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Wang, Yishu, Rosenbaum, T. F., Palmer, A., Ren, Y., Kim, J. -W., Mandrus, D., and Feng, Yejun. Strongly-coupled quantum critical point in an all-in-all-out antiferromagnet. United States: N. p., 2018. Web. doi:10.1038/s41467-018-05435-7.
Wang, Yishu, Rosenbaum, T. F., Palmer, A., Ren, Y., Kim, J. -W., Mandrus, D., & Feng, Yejun. Strongly-coupled quantum critical point in an all-in-all-out antiferromagnet. United States. doi:10.1038/s41467-018-05435-7.
Wang, Yishu, Rosenbaum, T. F., Palmer, A., Ren, Y., Kim, J. -W., Mandrus, D., and Feng, Yejun. Fri . "Strongly-coupled quantum critical point in an all-in-all-out antiferromagnet". United States. doi:10.1038/s41467-018-05435-7. https://www.osti.gov/servlets/purl/1465744.
@article{osti_1465744,
title = {Strongly-coupled quantum critical point in an all-in-all-out antiferromagnet},
author = {Wang, Yishu and Rosenbaum, T. F. and Palmer, A. and Ren, Y. and Kim, J. -W. and Mandrus, D. and Feng, Yejun},
abstractNote = {Dimensionality and symmetry play deterministic roles in the laws of Nature. They are important tools to characterize and understand quantum phase transitions, especially in the limit of strong correlations between spin, orbit, charge, and structural degrees of freedom. Using newly-developed, high-pressure resonant x-ray magnetic and charge diffraction techniques, we have discovered a quantum critical point in Cd2Os2O7 as the all-in-all-out antiferromagnetic order is continuously suppressed to zero temperature and, concomitantly, the cubic lattice structure continuously changes from space group Fd-3m to F-43m. Surrounded by three phases of different time reversal and spatial inversion symmetries, the quantum critical region anchors two phase lines of opposite curvature, with striking departures from a mean-field form at high pressure. As spin fluctuations, lattice breathing modes, and quasiparticle excitations interact in the quantum critical region, we argue that they present the necessary components for strongly-coupled quantum criticality in this three-dimensional compound.},
doi = {10.1038/s41467-018-05435-7},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {2018},
month = {7}
}

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    Works referencing / citing this record:

    X-ray magnetic diffraction under high pressure
    journal, June 2019


    X-ray magnetic diffraction under high pressure
    journal, June 2019