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Manipulating Topological Domain Boundaries in the Single-Layer Quantum Spin Hall Insulator 1T'-WSe2.
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.
  • Pedramrazi Z; Department of Physics , University of California at Berkeley , Berkeley , California 94720 , United States.
  • Herbig C; Department of Physics , University of California at Berkeley , Berkeley , California 94720 , United States.
  • Pulkin A; Institute of Physics , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland.
  • Tang S; Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States.
  • Phillips M; Advanced Light Source , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States.
  • Wong D; Stanford Institute for Materials and Energy Sciences , SLAC National Accelerator Laboratory , Menlo Park , California 94025 , United States.
  • Ryu H; Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics , Stanford University , Stanford , California 94305 , United States.
  • Pizzochero M; Department of Physics and Astronomy , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States.
  • Chen Y; Center for Computational Materials Science , Naval Research Laboratory , Washington , D.C. 20375 , United States.
  • Wang F; Department of Physics , University of California at Berkeley , Berkeley , California 94720 , United States.
  • Mele EJ; Advanced Light Source , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States.
  • Shen ZX; Center for Spintronics , Korea Institute of Science and Technology , Seoul 02792 , Korea.
  • Mo SK; Institute of Physics , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland.
  • Yazyev OV; Department of Physics , University of California at Berkeley , Berkeley , California 94720 , United States.
  • Crommie MF; Department of Physics , University of California at Berkeley , Berkeley , California 94720 , United States.
Nano Lett ; 19(8): 5634-5639, 2019 Aug 14.
Article en En | MEDLINE | ID: mdl-31329449
ABSTRACT
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'/1T' domain boundaries and protected states at 1T'/1H and 1T'/vacuum boundaries in single-layer WSe2.
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Texto completo: 1 Banco de datos: MEDLINE Tipo de estudio: Qualitative_research Idioma: En Año: 2019 Tipo del documento: Article
Texto completo
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XML
PubMed Links
Search on Google

Texto completo: 1 Banco de datos: MEDLINE Tipo de estudio: Qualitative_research Idioma: En Año: 2019 Tipo del documento: Article