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

Trinh, Jennifer and Mitra, Sreemanta and Panagopoulos, Christos and Kong, Tai and Canfield, Paul C and Ramirez, Arthur P (2018) Degeneracy of the 1/8 Plateau and Antiferromagnetic Phases in the Shastry-Sutherland Magnet TmB4. In: PHYSICAL REVIEW LETTERS, 121 (16).

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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.

Item Type:	Journal Article
Publication:	PHYSICAL REVIEW LETTERS
Publisher:	AMER PHYSICAL SOC
Additional Information:	Copy right for this article belong to AMER PHYSICAL SOC
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	14 Nov 2018 15:12
Last Modified:	14 Nov 2018 15:12
URI:	http://eprints.iisc.ac.in/id/eprint/61047

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