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Degeneracy of the 1/8 Plateau and Antiferromagnetic Phases in the Shastry-Sutherland Magnet TmB4

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [4];  [5];  [1]
  1. Univ. of California, Santa Cruz, CA (United States)
  2. Nanyang Technological Univ. (Singapore); Indian Institute of Science, Bangalore (India)
  3. Nanyang Technological Univ. (Singapore)
  4. Ames Lab. and Iowa State Univ., Ames, IA (United States); Princeton Univ., Princeton, NJ (United States)
  5. Ames Lab. and Iowa State Univ., Ames, IA (United States)
+ Show Author Affiliations
The 1/8 fractional plateau phase (1/8 FPP) in Shastry-Sutherland lattice (SSL) spin systems has been viewed an exemplar of emergence on an Archimedean lattice. Here we explore this phase in the Ising magnet TmB4 using high-resolution specific heat (C) and magnetization (M) in the field-temperature plane. We show that the 1/8 FPP is smoothly connected to the antiferromagnetic phase on ramping the field from H = 0. Furthermore, the 1/8 FPP is not a distinct thermodynamic ground state of TmB4. The implication of these results for Heisenberg spins on the SSL is discussed.
Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-07CH11358; SC0017862
OSTI ID:
1481018
Alternate ID(s):
OSTI ID: 1478610
Report Number(s):
IS-J--9798
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 121; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Insulator-metal transition and quasi-flat-band of Shastry–Sutherland lattice journal June 2019

Figures / Tables (4)

Fig. 1(p. 11)figure Fig. 1
Fig. 2(p. 12)figure Fig. 2
Fig. 3(p. 13)figure Fig. 3
Fig. 4(p. 14)figure Fig. 4

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Related Subjects

36 MATERIALS SCIENCE