期刊
NATURE PHYSICS
卷 13, 期 6, 页码 578-583出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS4056
关键词
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资金
- JSPS [JP25000003]
- MEXT [JP15H06133]
- Murata Science Foundation
- MEXT KAKENHI [JP24224009, JP26103006, JP25400317, JP15H05854]
- ImPACT Program of Council for Science, Technology and Innovation (Cabinet office, Government of Japan)
- [JP16J08009]
- Grants-in-Aid for Scientific Research [15H06133, 17K18748, 16H00923, 25000003, 17H02928, 17K19060] Funding Source: KAKEN
Noncentrosymmetric conductors are an interesting material platform, with rich spintronic functionalities(1,2) and exotic superconducting properties(3,4) typically produced in polar systems with Rashba-type spin-orbit interactions(5). Polar conductors should also exhibit inherent nonreciprocal transport(6-8), in which the rightward and leftward currents differ from each other. But such a rectification is diffcult to achieve in bulk materials because, unlike the translationally asymmetric p-n junctions, bulk materials are translationally symmetric, making this phenomenon highly nontrivial. Here we report a bulk rectification effect in a three-dimensional Rashba-type polar semiconductor BiTeBr. Experimentally observed nonreciprocal electric signals are quantitatively explained by theoretical calculations based on the Boltzmann equation considering the giant Rashba spin-orbit coupling. The present result offers a microscopic understanding of the bulk rectification effect intrinsic to polar conductors as well as a simple electrical means to estimate the spin-orbit parameter in a variety of noncentrosymmetric systems.
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