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

Trinh, Jennifer; Mitra, Sreemanta; Panagopoulos, Christos; Kong, Tai; Canfield, Paul C.; Ramirez, Arthur P.

doi:10.1103/physrevlett.121.167203

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

Journal Article · Thu Oct 18 00:00:00 EDT 2018 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.121.167203· OSTI ID:1481018

Trinh, Jennifer ^[1]; Mitra, Sreemanta ^[2]; Panagopoulos, Christos ^[3]; Kong, Tai ^[4]; Canfield, Paul C. ^[5]; Ramirez, Arthur P. ^[1]

Univ. of California, Santa Cruz, CA (United States)
Nanyang Technological Univ. (Singapore); Indian Institute of Science, Bangalore (India)
Nanyang Technological Univ. (Singapore)
Ames Lab. and Iowa State Univ., Ames, IA (United States); Princeton Univ., Princeton, NJ (United States)
Ames Lab. and Iowa State Univ., Ames, IA (United States)

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.

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Research Organization:: Ames Lab., Ames, IA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: NSF-DMR 1534741; SC0017862; AC02-07CH11358; MOE2014-T2-2-112; NRF-NRFI2015-04

OSTI ID:: 1481018

Alternate ID(s):: OSTI ID: 1478610

Report Number(s):: IS-J-9798; PRLTAO

Journal Information:: Physical Review Letters, Vol. 121, Issue 16; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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

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