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arXiv 2103.05650cond-mat.str-elcond-mat.mes-hallcond-mat.supr-con
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声子-自旋相互作用的声子霍尔粘度

Phonon Hall viscosity from phonon-spinon interactions

Yunchao Zhang, Yanting Teng, Rhine Samajdar, Subir Sachdev, Mathias S. Scheurer

摘要:

受实验观察的启发,Samajdar等人[Nature Physics 15,1290(2019)]提出,铜酸盐母体化合物中的绝缘Neel态接近于量子相变,达到Neel序与半离子拓扑序共存的状态。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。

英文摘要:

Motivated by experimental observations, Samajdar et al. [Nature Physics 15, 1290 (2019)] have proposed that the insulating Neel state in the parent compounds of the cuprates is proximate to a quantum phase transition to a state in which Neel 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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