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

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

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

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. Thus, 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.

Original languageEnglish (US)
Article number167203
JournalPhysical review letters
Volume121
Issue number16
DOIs
StatePublished - Oct 18 2018
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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