Reshaped Weyl fermionic dispersions driven by Coulomb interactions in MoTe2

Seoung Hun Kang, Sangjun Jeon, Hyun Jung Kim, Wonhee Ko, Suyeon Cho, Se Hwang Kang, Sung Wng Kim, Heejun Yang, Hyo Won Kim, Young Woo Son

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Article number045143
JournalPhysical Review B
Volume105
Issue number4
DOIs
StatePublished - 15 Jan 2022

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