학술논문
WS$_2$ Band Gap Renormalization Induced by Tomonaga Luttinger Liquid Formation in Mirror Twin Boundaries
Document Type
Working Paper
Author
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
Source
Subject
Language
Abstract
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.
Comment: Main text is 13 pages, 4 figures; Supplementary text is 14 pages, 11 figures
Comment: Main text is 13 pages, 4 figures; Supplementary text is 14 pages, 11 figures