Journal Article

FZJ-2022-01218

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Reshaped Weyl fermionic dispersions driven by Coulomb interactions in MoTe2

Kang, S.-H. ; Jeon, S. (Corresponding author) ; Kim, H.-J.FZJ* ; Ko, W. ; Cho, S. ; Kang, S. H. ; Kim, S. W. ; Yang, H. ; Kim, H. W. (Corresponding author) ; Son, Y.-W. (Corresponding author)

2022
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/30647  doi:10.1103/PhysRevB.105.045143

Abstract: We report the direct evidence of impacts of the Coulomb interaction in a prototypical Weyl semimetal, MoTe2, that alter its bare bands in a wide range of energy and momentum. Our quasiparticle interference patterns measured using scanning tunneling microscopy are shown to match the joint density of states of quasiparticle energy bands including momentum-dependent self-energy corrections, while electronic energy bands based on the other simpler local approximations of the Coulomb interaction fail to explain neither the correct number of quasiparticle pockets nor the shape of their dispersions observed in our spectrum. With this, we predict a transition between type-I and type-II Weyl fermions with doping and resolve its disparate quantum oscillation experiments, thus highlighting the critical roles of Coulomb interactions in layered Weyl semimetals.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IAS-1)
2. Quanten-Theorie der Materialien (PGI-1)
3. JARA-FIT (JARA-FIT)
4. JARA - HPC (JARA-HPC)

Research Program(s):

1. 5211 - Topological Matter (POF4-521) (POF4-521)

Appears in the scientific report 2022

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Database coverage:
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