Topological nonlinear anomalous Nernst effect in strained transition metal dichalcogenides

Xiao Qin Yu, Zhen Gang Zhu, Jhih Shih You, Tony Low, Gang Su

研究成果: 雜誌貢獻期刊論文同行評審

49 引文 斯高帕斯(Scopus)

摘要

We theoretically analyze the nonlinear anomalous Nernst effect as the second-order response of temperature gradient by using the semiclassical framework of electron dynamics. We find that a nonlinear current can be generated transverse to the applied temperature gradient in time-reversal-symmetry materials with broken inversion symmetry. This effect has a quantum origin arising from the Berry curvature of states near the Fermi surface. We discuss the nonlinear Nernst effect in transition metal dichalcogenides (TMDCs) under the application of uniaxial strain. In particular, we predict that under fixed chemical potential in TMDCs, the nonlinear Nernst current exhibits a transition from T-2 temperature dependence in low temperature regime to a linear T dependence in high temperature.

原文英語
文章編號201410
期刊Physical Review B
99
發行號20
DOIs
出版狀態已發佈 - 2019 5月 20
對外發佈

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學

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