Topological charge-entropy scaling in kagome Chern magnet TbMn6Sn6

Xu，Xitong1,2; Yin，Jia Xin3; Ma，Wenlong2; Tien，Hung Ju4,5; Qiang，Xiao Bin6; Reddy，P. V.Sreenivasa4; Zhou，Huibin2; Shen，Jie1,7; Lu，Hai Zhou6; Chang，Tay Rong4,5,8; Qu，Zhe1,7,9; Jia，Shuang2,10,11

2022-12-01

10.1038/s41467-022-28796-6

Nature Communications   影响因子和分区

2041-1723

In ordinary materials, electrons conduct both electricity and heat, where their charge-entropy relations observe the Mott formula and the Wiedemann-Franz law. In topological quantum materials, the transverse motion of relativistic electrons can be strongly affected by the quantum field arising around the topological fermions, where a simple model description of their charge-entropy relations remains elusive. Here we report the topological charge-entropy scaling in the kagome Chern magnet TbMnSn, featuring pristine Mn kagome lattices with strong out-of-plane magnetization. Through both electric and thermoelectric transports, we observe quantum oscillations with a nontrivial Berry phase, a large Fermi velocity and two-dimensionality, supporting the existence of Dirac fermions in the magnetic kagome lattice. This quantum magnet further exhibits large anomalous Hall, anomalous Nernst, and anomalous thermal Hall effects, all of which persist to above room temperature. Remarkably, we show that the charge-entropy scaling relations of these anomalous transverse transports can be ubiquitously described by the Berry curvature field effects in a Chern-gapped Dirac model. Our work points to a model kagome Chern magnet for the proof-of-principle elaboration of the topological charge-entropy scaling.

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其他

2-s2.0-85125975514

Scopus

1.Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei,Anhui,230031,China
2.International Center for Quantum Materials,School of Physics,Peking University,Beijing,100871,China
3.Department of Physics,Princeton University,Princeton,08544,United States
4.Department of Physics,National Cheng Kung University,Tainan,701,Taiwan
5.Center for Quantum Frontiers of Research and Technology (QFort),Tainan,701,Taiwan
6.Department of Physics and Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
7.Science Island Branch of Graduate School,University of Science and Technology of China,Hefei,Anhui,230026,China
8.Physics Division,National Center for Theoretical Sciences,Taipei,10617,Taiwan
9.CAS Key Laboratory of Photovoltaic and Energy Conservation Materials,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei,Anhui,230031,China
10.Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials,Peking University,Beijing,100871,China
11.CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing,100190,China

Xu，Xitong,Yin，Jia Xin,Ma，Wenlong,et al. Topological charge-entropy scaling in kagome Chern magnet TbMn6Sn6[J]. Nature Communications,2022,13(1).

Xu，Xitong.,Yin，Jia Xin.,Ma，Wenlong.,Tien，Hung Ju.,Qiang，Xiao Bin.,...&Jia，Shuang.(2022).Topological charge-entropy scaling in kagome Chern magnet TbMn6Sn6.Nature Communications,13(1).

Xu，Xitong,et al."Topological charge-entropy scaling in kagome Chern magnet TbMn6Sn6".Nature Communications 13.1(2022).