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20 April 2024 |
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Article overview
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Experimental evidence of type-II Dirac fermions in PtSe2 | Kenan Zhang
; Mingzhe Yan
; Haoxiong Zhang
; Huaqing Huang
; Masashi Arita
; Zhe Sun
; Wenhui Duan
; Yang Wu
; Shuyun Zhou
; | Date: |
13 Mar 2017 | Abstract: | Topological semimetals have attracted extensive research interests for
realizing condensed matter physics counterparts of three-dimensional Dirac and
Weyl fermions, which were originally introduced in high energy physics.
Recently it has been proposed that type-II Dirac semimetal can host a new type
of Dirac fermions which break Lorentz invariance and therefore does not have
counterpart in high energy physics. Here we report the electronic structure of
high quality PtSe$_2$ crystals to provide direct evidence for the existence of
three-dimensional type-II Dirac fermions. A comparison of the crystal,
vibrational and electronic structure to a sister compound PtTe$_2$ is also
discussed. Our work provides an important platform for exploring the novel
quantum phenomena in the PtSe$_2$ class of type-II Dirac semimetals. | Source: | arXiv, 1703.4242 | Services: | Forum | Review | PDF | Favorites |
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