WS\(_2\) Band Gap Renormalization Induced by Tomonaga Luttinger Liquid Formation in Mirror Twin Boundaries

Tomonaga-Luttinger liquid (TLL) behavior in one-dimensional systems has been predicted and shown to occur at semiconductor-to-metal transitions within two-dimensional materials. Reports of mirror twin boundaries (MTBs) hosting a Fermi liquid or a TLL have suggested a dependence on the underlying sub...

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Published in:arXiv.org 2023-01
Main Authors: Rossi, Antonio, Thomas, John C, Küchle, Johannes T, Barré, Elyse, Yu, Zhuohang, Zhou, Da, Kumari, Shalini, Tsai, Hsin-Zon, Wong, Ed, Jozwiak, Chris, Bostwick, Aaron, Robinson, Joshua A, Terrones, Mauricio, Raja, Archana, Schwartzberg, Adam, Ogletree, D Frank, Neaton, Jeffrey B, Crommie, Michael F, Allegretti, Francesco, Auwärter, Willi, Rotenberg, Eli, Weber-Bargioni, Alexander
Format: Article
Language:English
Subjects:
Atomic structure
Defects
Electron transfer
Energy gap
Fermi liquids
Graphene
Photoelectrons
Scanning tunneling microscopy
Spectroscopy
Substrates
Twin boundaries
Two dimensional materials
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Summary:Tomonaga-Luttinger liquid (TLL) behavior in one-dimensional systems has been predicted and shown to occur at semiconductor-to-metal transitions within two-dimensional materials. Reports of mirror twin boundaries (MTBs) hosting a Fermi liquid or a TLL have suggested a dependence on the underlying substrate, however, unveiling the physical details of electronic contributions from the substrate require cross-correlative investigation. Here, we study TLL formation in MTBs within defectively engineered WS\(_2\) atop graphene, where band structure and the atomic environment is visualized with nano angle-resolved photoelectron spectroscopy, scanning tunneling microscopy and scanning tunneling spectroscopy, and non-contact atomic force microscopy. Correlations between the local density of states and electronic band dispersion elucidated the electron transfer from graphene into a TLL hosted by MTB defects. We find that MTB defects can be substantially charged at a local level, which drives a band gap shift by \(\sim\)0.5 eV.
ISSN:2331-8422