University of California Santa Cruz, Santa Cruz, California 95064, USA.
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore.
Phys Rev Lett. 2018 Oct 19;121(16):167203. doi: 10.1103/PhysRevLett.121.167203.
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 TmB_{4} 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 TmB_{4}. The implication of these results for Heisenberg spins on the SSL is discussed.
Shastry-Sutherland 格点（SSL）自旋系统中的 1/8 分数平台相（1/8 FPP）一直被视为阿基米德格点上涌现的范例。在这里，我们使用高分辨率比热（C）和磁场温度平面中的磁化率（M）来研究 Ising 磁体 TmB4 中的这个相。我们表明，在磁场从 H=0 增加时，1/8 FPP 与反铁磁相平滑连接。因此，1/8 FPP 不是 TmB4 的独特热力学基态。我们讨论了这些结果对 SSL 上的海森堡自旋的影响。
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