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Title: Nematic State in CeAuSb 2

Journal Article · · Physical Review. X
ORCiD logo [1];  [2]; ORCiD logo [1]; ORCiD logo [1];  [3]; ORCiD logo [1]; ORCiD logo [1];  [3]; ORCiD logo [1]; ORCiD logo [1];  [4]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Chicago, IL (United States). James Franck Inst.
  3. Brazilian Synchrotron Light Lab. (LNLS), Sao Paolo (Brazil)
  4. Univ. of Minnesota, Minneapolis, MN (United States)

At ambient pressure and zero field, tetragonal CeAuSb2 hosts stripe antiferromagnetic order at TN= 6.3 K. Here, we first show via bulk thermodynamic probes and x-ray diffraction measurements that this magnetic order is connected with a structural phase transition to a superstructure that likely breaks C4 symmetry, thus signaling nematic order. The temperature-field-pressure phase diagram of CeAuSb2 subsequently reveals the emergence of additional ordered states under applied pressure at a multicritical point. Our phenomenological model supports the presence of a vestigial nematic phase in CeAuSb2 akin to iron-based high-temperature superconductors; however, superconductivity, if present, remains to be discovered.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
89233218CNA000001; SC0012336; SC0020045
OSTI ID:
1599487
Alternate ID(s):
OSTI ID: 1630855; OSTI ID: 1656854
Report Number(s):
LA-UR-19-27666; PRXHAE; TRN: US2200947
Journal Information:
Physical Review. X, Vol. 10, Issue 1; ISSN 2160-3308
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

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Figures / Tables (5)