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arXiv 2004.13047cond-mat.str-el
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温度梯度诱导的非互易定向二向色性作为量子磁体中自旋运动动力学的探针

Nonreciprocal directional dichroism induced by a temperature gradient as a probe for mobile spin dynamics in quantum magnets

Xu Yang, Ying Ran

摘要:

近年来,诸如量子自旋液体等量子磁体中的新物质态引起了人们极大的兴趣。尽管存在大量的候选材料,但由于缺乏合适的实验探针,目前还没有确定的量子自旋液体。例如,像中子散射这样的光谱学实验接收来自无序诱导的局部模式的贡献,而热输运实验接收来自声子的贡献。在这里,我们提出了一个热光实验,直接探测移动磁激发的空间反转对称和/或时间反转对称莫特绝缘体:温度梯度诱导的非互易定向二向色性(TMDD)光谱。与传统的探针不同,TNDD直接检测来自声子和局部磁模式的移动磁激发和激发。

英文摘要:

Novel states of matter in quantum magnets like quantum spin liquids attract considerable interest recently. Despite the existence of a plenty of candidate materials, there is no confirmed quantum spin liquid, largely due to the lack of proper experimental probes. For instance, spectrosocopy experiments like neutron scattering receive contributions from disorder-induced local modes, while thermal transport experiments receive contributions from phonons. Here we propose a thermo-optic experiment which directly probes the mobile magnetic excitations in spatial-inversion symmetric and/or time-reversal symmetric Mott insulators: the temperature-gradient-induced nonreciprocal directional dichroism (TNDD) spectroscopy. Unlike traditional probes, TNDD directly detects mobile magnetic excitations and decouples from phonons and local magnetic modes.

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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