手性及π-通量量子自旋液体中的自旋子诱导声子动力学
Spinon-Induced Phonon Dynamics in Chiral and $π$-Flux Quantum Spin Liquids
- National Institute of Physics, University of the Philippines Diliman（菲律宾大学迪利曼分校物理研究所）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文通过计算声子自能，研究自旋子-声子耦合下不同量子自旋液体相（包括手性及π-通量）对声子动力学的影响，发现声子谱不受重整化而声衰减和热导率可区分各相，且手性QSL不产生声子热霍尔效应，确立声子输运为识别QSL的探针。
AI中文摘要：
量子自旋液体（QSLs）是一类由于强量子涨落而在最低温度下仍不出现长程有序的磁性相。然而，由于缺乏常规的有序参量，其实验识别颇具挑战。在本工作中，我们研究了不同QSL相如何通过自旋子-声子耦合影响声子动力学。通过计算声子自能，我们表明声子谱不受自旋子相互作用的重整化，而声衰减和声子热导率则表现出底层QSL相的独特特征。因此，这些响应函数为区分不同QSL背景提供了实验上可获取的指纹。值得注意的是，我们发现，与声子耦合的手性QSL尽管明确破缺了时间反演对称性，却不会产生声子热霍尔效应。我们的结果确立了声子输运作为识别和表征量子自旋液体的潜在探针。
英文摘要：
Quantum spin liquids (QSLs) are magnetic phases that evade long-range order down to the lowest temperatures due to strong quantum fluctuations. Their lack of conventional order parameters, however, makes experimental identification challenging. In this work, we investigate how distinct QSL phases affect phonon dynamics through spinon-phonon coupling. By computing the phonon self-energy, we show that the phonon spectrum remains unrenormalized by spinon interactions, while sound attenuation and phonon thermal conductivity exhibit distinct signatures of the underlying QSL phase. These response functions therefore provide experimentally accessible fingerprints for distinguishing different QSL backgrounds. Remarkably, we find that a chiral QSL coupled to phonons does not generate a phonon thermal Hall effect despite explicitly breaking time-reversal symmetry. Our results establish phonon transport as a potential probe for identifying and characterizing quantum spin liquids.
