Phonon Hall viscosity from phonon-spinon interactions
Phonon Hall viscosity from phonon-spinon interactions
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DOI：
10.1103/physrevb.104.035103
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发表时间：
2021-07-02
影响因子：
3.7
通讯作者：
Scheurer, Mathias S.
中科院分区：
文献类型：
--
作者：
Zhang, Yunchao;Teng, Yanting;Scheurer, Mathias S.
受实验观察的启发，Samajdar等人[Nat. Phys. 15，1290（2019）]提出，铜酸盐母体化合物中的绝缘Ned态接近于量子相变，达到Ned序与semion共存的状态拓扑顺序。我们研究的方式，接近这个过渡可以使声子手性，通过诱导一个显着的声子霍尔粘度。我们描述了一个耦合到应变场的晶格自旋模型中的自旋-声子耦合，并且也使用了仅受对称性约束的一般连续介质理论。我们发现一个非解析霍尔粘度的过渡，在零温度下的发散二阶导数。
Motivated by experimental observations, Samajdar et al. [Nat. Phys. 15, 1290 (2019)] have proposed that the insulating Ned state in the parent compounds of the cuprates is proximate to a quantum phase transition to a state in which Ned order coexists with semion topological order. We study the manner in which proximity to this transition can make the phonons chiral, by inducing a significant phonon Hall viscosity. We describe the spinon-phonon coupling in a lattice spinon model coupled to a strain field, and also using a general continuum theory constrained only by symmetry. We find a nonanalytic Hall viscosity across the transition, with a divergent second derivative at zero temperature.