物理学进展2022，Vol.42Issue(5)：159-183,25.DOI:10.13725/j.cnki.pip.2022.05.001
强关联材料霍尔热导率实验测量综述
Experimental Progress in Thermal Hall Conductivity Research on Strongly Correlated Electronic Systems
摘要
Abstract
Thermal Hall effect (THE) is to describe the phenomenon where heat carriers are deflected by an external magnetic field applied perpendicular to the heat flow, and thus the carriers gain transverse velocity, leading to a finite temperature gradient on the two sides orthogonal to the heat flow and field. THE is predicted to occur in systems with nontrivial Berry curvatures and thus can reveal topological properties, similar to the electrical Hall effect. However, THE is not limited to charge excitations as in the electrical Hall effect, but rather, to all kinds of excitations that are able to conduct heat, making it possible to explore the exotic properties in strongly correlated electronic systems, which are typically insulators. Therefore, THE is more universal than the electrical form and has become a powerful probe in detecting charge-neutral excitations, such as phonons and magnons. Moreover, there are some sources such as chiral phonons, which are beyond a simple nontrivial-Berry-curvature scenario, that can also give rise to THE;examining THE wherein will shed light on the complex microscopic mechanism hidden in materials. Despite these, heat signals are much weaker than electrical ones. Especially for measurements of the thermal Hall conductivity, it is often needed to collect weak signals on top of a large background. This makes measuring the THE challenging—but thanks to the sustained efforts of the community, this field is developing rapidly in recent years, with many interesting results on the measurements of the thermal Hall conductivity. In this review article, we try to summarize some of these exciting accomplishments, point out remaining outstanding issues, and suggest possible future directions.关键词
热霍尔效应/拓扑/量子自旋液体/多铁材料/赝能隙相Key words
thermal Hall effect/topology/quantum spin liquid/multiferoics/pseudogap phase分类
数理科学引用本文复制引用
徐豪,承舒凡,鲍嵩,温锦生..强关联材料霍尔热导率实验测量综述[J].物理学进展,2022,42(5):159-183,25.基金项目
The work was supported by National Key Projects for Research and Development of China with Grant No.2021YFA1400400,the National Natural Science Foundation of China with Grants No.12225407 and 12074174,China Postdoctoral Science Foundation with Grants No.2022M711569 and 2022T150315,Jiangsu Province Excellent Postdoctoral Program with Grant No.20220ZB5,and Fundamental Research Funds for the Central Universities. （）
