@article{c7ea4350fc2045aebe313c179e058acc,
title = "Nonreciprocal thermal transport in a multiferroic helimagnet",
abstract = "Breaking of spatial inversion symmetry induces unique phenomena in condensed matter. In particular, by combining this symmetry with magnetic fields or another type of time-reversal symmetry breaking, noncentrosymmetric materials can be made to exhibit nonreciprocal responses, which are responses that differ for rightward and leftward stimuli. However, the effect of spatial inversion symmetry breaking on thermal transport in uniform media remains to be elucidated. Here, we show nonreciprocal thermal transport in the multiferroic helimagnet TbMnO3. The longitudinal thermal conductivity depends on whether the thermal current is parallel or antiparallel to the vector product of the electric polarization and magnetization. This phenomenon is thermal rectification that is controllable with external fields in a uniform crystal. This discovery may pave the way to thermal diodes with controllability and scalability.",
author = "Yuji Hirokane and Yoichi Nii and Hidetoshi Masuda and Yoshinori Onose",
note = "Funding Information: We thank S. Murakami for fruitful discussions. Funding: This work was supported in part by JSPS KAKENHI (grant numbers JP16H04008, JP17H05176, JP18K13494, and 20K03828), PRESTO (grant number JPMJPR19L6), the Murata Science Foundation, and the Mitsubishi foundation. Author contributions: Y. H. carried out the crystal growth, magnetization measurement, and thermal transport measurement with assistance from Y.N. and H.M. Y.O. conceived and supervised the project. Y.O. wrote the paper through the discussion and assistance from Y. H., Y. N., and H. M. Competing interests: The authors declare that they have no competing interests. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials. Additional data related to this paper may be requested from the authors.",
year = "2020",
month = sep,
day = "30",
doi = "10.1126/sciadv.abd3703",
language = "English",
volume = "6",
journal = "Science advances",
issn = "2375-2548",
publisher = "American Association for the Advancement of Science",
number = "40",
}