Trimer classical spin liquid from interacting fractional charges
Trimer classical spin liquid from interacting fractional charges
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来自相互作用的分数电荷的三聚体经典自旋液体
DOI：
10.1103/physrevb.100.134415
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发表时间：
2019
影响因子：
3.7
通讯作者：
Udagawa Masafumi
中科院分区：
文献类型：
--
作者：
Tokushuku Kunio;Mizoguchi Tomonari;Udagawa Masafumi
我们用 Ising 模型研究了磁场下棋盘晶格上分数电荷相互作用的问题。由于排斥相互作用和磁场调节粒子密度之间的相互作用，分数电荷形成经典的自旋液体 (CSL) 相。 CSL相由简并自旋构型组成，可以映射到双方晶格的三聚体覆盖。 CSL态显示出宏观基态熵，这意味着当量子涨落开启时会出现一种新型的量子自旋液相。除了 CSL 相外，该系统还表现出多个磁化平台，反映了二聚体-单体混合物的有效筛选过程。
We study a problem of interacting fractional charges with theIsing model on a checkerboard lattice under magnetic field. As a result of the interplay between repulsive interactions and particle density tuning by a magnetic field, the fractional charges form a classical spin liquid (CSL) phase. The CSL phase is composed of degenerate spin configurations, which can be mapped to the trimer covering of dual square lattice. The CSL state shows macroscopic ground-state entropy, implying the emergence of a novel quantum spin liquid phase when quantum fluctuations are turned on. In addition to the CSL phase, the system exhibits multiple magnetization plateaus, reflecting the fertile screening processes of dimer-monomer mixtures.