arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.08385cond-mat.str-el
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霍尔热导率的普遍行为

Universal behavior of the thermal Hall conductivity

Yi-feng Yang, Guang-Ming Zhang, Fu-Chun Zhang

摘要:

我们报告的相关系统的热霍尔电导率的理论和实验分析。对于费米子和玻色子的激发与非平凡的拓扑结构,我们表明,在“中间”温度下,热霍尔电导率表现出意想不到的通用缩放与一个简单的指数形式。在低温下,它的行为不同,并反映了潜在的激发光谱特性。我们的预测进行检查,在两个原型化合物,量子顺电SrTiO $_3$和自旋液体化合物RuCl $_3$的例子。实验数据可以在很大程度上覆盖我们提出的最小唯象模型独立的微观细节,揭示占主导地位的玻色子贡献SrTiO $_3$和带隙的费米子激发RuCl $_3$。我们的工作建立了微观模型和实验数据之间的唯象联系,并提供了一个统一的基础上分析相关系统的热霍尔电导率在一个很宽的温度区域。

英文摘要:

We report theoretical and experimental analyses of the thermal Hall conductivity in correlated systems. For both fermionic and bosonic excitations with nontrivial topology, we show that at "intermediate" temperatures, the thermal Hall conductivity exhibits an unexpected universal scaling with a simple exponential form. At low temperatures, it behaves differently and reflects the spectral properties of underlying excitations. Our predictions are examined as examples in two prototype compounds, the quantum paraelectric SrTiO$_3$ and the spin-liquid compound RuCl$_3$. The experimental data can be largely covered by our proposed minimal phenomenological model independent of microscopic details, revealing dominant bosonic contributions in SrTiO$_3$ and gapped fermionic excitations in RuCl$_3$. Our work establishes a phenomenological link between microscopic models and experimental data and provides a unified basis for analyzing the thermal Hall conductivity in correlated systems over a wide temperature region.

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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