Lorentz-violating type-II Dirac fermions in transition metal dichalcogenide PtTe(2).
Lorentz-violating type-II Dirac fermions in transition metal dichalcogenide PtTe(2).
复制标题
过渡金属二硫属化物 PtTe2 中的洛伦兹破坏 II 型狄拉克费米子
DOI:
10.1038/s41467-017-00280-6
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发表时间:
2017-08-15
影响因子:
16.6
通讯作者:
Zhou S
中科院分区:
文献类型:
--
作者:
Yan M;Huang H;Zhang K;Wang E;Yao W;Deng K;Wan G;Zhang H;Arita M;Yang H;Sun Z;Yao H;Wu Y;Fan S;Duan W;Zhou S
Topological semimetals have recently attracted extensive research interests as host materials to condensed matter physics counterparts of Dirac and Weyl fermions originally proposed in high energy physics. Although Lorentz invariance is required in high energy physics, it is not necessarily obeyed in condensed matter physics, and thus Lorentz-violating type-II Weyl/Dirac fermions could be realized in topological semimetals. The recent realization of type-II Weyl fermions raises the question whether their spin-degenerate counterpart—type-II Dirac fermions—can be experimentally realized too. Here, we report the experimental evidence of type-II Dirac fermions in bulk stoichiometric PtTe2single crystal. Angle-resolved photoemission spectroscopy measurements and first-principles calculations reveal a pair of strongly tilted Dirac cones along the Γ-A direction, confirming PtTe2as a type-II Dirac semimetal. Our results provide opportunities for investigating novel quantum phenomena (e.g., anisotropic magneto-transport) and topological phase transition.
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影响因子:
3.7
作者:
Wang, Zhijun;Sun, Yan;Fang, Zhong
通讯作者:
Fang, Zhong
影响因子:
3.7
作者:
Huang, Huaqing;Zhou, Shuyun;Duan, Wenhui
通讯作者:
Duan, Wenhui
影响因子:
12.5
作者:
Lv, B. Q.;Weng, H. M.;Ding, H.
通讯作者:
Ding, H.
影响因子:
41.2
作者:
Liu, Z. K.;Jiang, J.;Chen, Y. L.
通讯作者:
Chen, Y. L.
影响因子:
41.2
作者:
Lu, X. F.;Wang, N. Z.;Chen, X. H.
通讯作者:
Chen, X. H.