Large Thermal Hall Effect in Spinel FeCr2S4

被引：0
作者：
Zhou, Xuebo [1 ,2 ]
Wu, Wei [1 ,2 ]
Sui, Yu [3 ,4 ]
Yang, Yi-feng [1 ,2 ,5 ,6 ]
Luo, Jianlin [1 ,2 ,5 ,6 ]
机构：
[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[3] Harbin Inst Technol, Sch Phys, Harbin 150001, Peoples R China
[4] Harbin Inst Technol, Lab Space Environm & Phys Sci, Harbin 150001, Peoples R China
[5] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100190, Peoples R China
[6] Songshan Lake Mat Lab, Dongguan 523808, Peoples R China
来源：
ADVANCED FUNCTIONAL MATERIALS | 2024年 / 34卷 / 16期
基金：
美国国家科学基金会;
关键词：
Berry curvature; magnon; thermal hall; CONDUCTIVITY; EXCITATIONS;
D O I：
10.1002/adfm.202304921
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The thermal Hall effect (THE) is an important experimental probe of band topology and elementary excitations. Here, a large thermal Hall angle (THA) kappa(xy)/kappa(xx) approximate to 7 x 10(-3) discovered so far in ferrimagnetic spinel FeCr2S4 and a large thermal Hall conductivity (kappa(xy)) discovered first in spinel structure and reaching a magnitude of kappa(xy) approximate to 1.8 x 10(-2) WK-1 m(-1) at 50 K with a small magnetic field of 0.1 T are reported. These results suggest the emergence of nontrivial topological excitations in FeCr2S4. A large THA in spin caloritronics devices means that a small number of excitations can produce a large transverse signal. FeCr2S4 is therefore a potential platform for spintronics-magnonics applications, and may enhance the knowledge of the thermal Hall effect.
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页数：6
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