Manipulating topological domain boundaries in the single-layer quantum spin Hall insulator 1T′-WSe2

Title
Manipulating topological domain boundaries in the single-layer quantum spin Hall insulator 1T′-WSe2
Authors
류혜진Zahra PedramraziCharlotte HerbigArtem PulkinShujie TangMadeleine PhillipsDillon WongMichele PizzocheroYi ChenFeng WangEugene J. MeleZhi-Xun ShenSung-Kwan MoOleg V. YazyevMichael F. Crommie
Issue Date
2019-08
Publisher
Nano letters
Citation
VOL 19, NO 8-5639
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.
URI
http://pubs.kist.re.kr/handle/201004/70307
ISSN
1530-6984
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE