Pedramrazi, Zahra Herbig, Charlotte Pulkin, Artem Tang, Shujie Phillips, Madeleine Wong, Dillon Ryu, Hyejin Pizzochero, Michele Chen, Yi Wang, Feng Mele, Eugene J. Shen, Zhi-Xun Mo, Sung-Kwan Yazyev, Oleg V. Crommie, Michael F. 2024-01-19T19:32:29Z 2024-01-19T19:32:29Z 2021-09-02 2019-08 1530-6984 https://pubs.kist.re.kr/handle/201004/119729 We report the creation and manipulation of structural phase boundaries in the single-layer quantum spin Hall insulator 1T'-WSe2 by means of scanning tunneling microscope tip pulses. We observe the formation of one-dimensional interfaces between topologically nontrivial 1T' domains having different rotational orientations, as well as induced interfaces between topologically nontrivial 1T' and topologically trivial 1H phases. Scanning tunneling spectroscopy measurements show that 1T'/1T' interface states are localized at domain boundaries, consistent with theoretically predicted unprotected interface modes that form dispersive bands in and around the energy gap of this quantum spin Hall insulator. We observe a qualitative difference in the experimental spectral line shape between topologically "unprotected" states at 1T'/IT' domain boundaries and protected states at 1T'/1H and 1T'/vacuum boundaries in single-layer WSe2. English AMER CHEMICAL SOC PHASE-TRANSITION MONOLAYER RESISTANCE Manipulating Topological Domain Boundaries in the Single-Layer Quantum Spin Hall Insulator 1T '-WSe2 Article 10.1021/acs.nanolett.9b02157 1 NANO LETTERS, v.19, no.8, pp.5634 - 5639 NANO LETTERS 19 8 5634 5639 scie scopus 000481563800105 2-s2.0-85070632320 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article PHASE-TRANSITION MONOLAYER RESISTANCE Scanning tunneling microscopy transition metal dichalcogenides quantum spin hall insulators domain boundary ferroelasticity