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Title: Absence of nematic ordering transition in a diamond lattice: Application to FeSc 2 S 4

Journal Article · · Physical Review B

Recent neutron scattering observations by [Plumb et al., Phys. Rev. X 6, 041055 (2016)] reveal that the ground state of FeSc 2 S 4 is magnetic with two distinct Fe environments, instead of a quantum spin liquid as had been previously thought. Starting with the relevant O(N)-symmetric vector model of FeSc 2 S 4 , we study how the discrete (Z2) and continuous rotational symmetries are successively broken, yielding nematic and ordered phases. At high temperatures, we find that the nematic order parameter falls as T–γ (γ > 0), and therefore, FeSc 2 S 4 lacks any distinct nematic ordering temperature. Furthermore, this feature indicates that the three-dimensional diamond lattice of FeSc 2 S 4 is highly susceptible to the breaking of Ising symmetries, and explains the two distinct Fe environments that are present even at high temperatures, as seen by Mössbauer and far-infrared optical spectroscopy.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-98CH10886; DMR-1461952; AC02-98CH1088
OSTI ID:
1388510
Alternate ID(s):
OSTI ID: 1338099
Journal Information:
Physical Review B, Vol. 95, Issue 2; Related Information: CES partners with Brookhaven National Laboratory (BNL); Argonne National Laboratory; University of Illinois, Urbana-Champaign; Los Alamos National Laboratory; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

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