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공과대학
화공신소재공학과
Journal papers
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Reshaped Weyl fermionic dispersions driven by Coulomb interactions in MoTe2
Title
Reshaped Weyl fermionic dispersions driven by Coulomb interactions in MoTe2
Authors
Kang S.-H.
;
Jeon S.
;
Kim H.-J.
;
Ko W.
;
Cho S.
;
Kang S.H.
;
Kim S.W.
;
Yang H.
;
Kim H.W.
;
Son Y.-W.
Ewha Authors
조수연
SCOPUS Author ID
조수연
Issue Date
2022
Journal Title
Physical Review B
ISSN
2469-9950
Citation
Physical Review B vol. 105, no. 4
Publisher
American Physical Society
Indexed
SCIE; SCOPUS
Document Type
Article
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. © 2022 American Physical Society.
DOI
10.1103/PhysRevB.105.045143
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