2026-06-01T17:08:16Z https://archive.materialscloud.org/oai2d

oai:materialscloud.org:675 2020-12-06T11:46:14Z openaire_data community-mcarchive

Pulkin, Artem Yazyev, Oleg V. Pulkin, Artem Yazyev, Oleg V. 2020-12-06 Two-dimensional transition metal dichalcogenides (TMDs) of Mo and W in their 1T′ crystalline phase host the quantum spin Hall (QSH) insulator phase. We address the electronic properties of the QSH edge states by means of first-principles calculations performed on realistic models of edge terminations of different stoichiometries. The QSH edge states show a tendency to have complex band dispersions and coexist with topologically trivial edge states. We nevertheless identify two stable edge terminations that allow isolation of a pair of helical edge states within the band gap of TMDs, with monolayer 1T′-WSe2 being the most promising material. We also characterize the finite-size effects in the electronic structure of 1T′-WSe2 nanoribbons. Our results provide guidance to the experimental studies and possible practical applications of QSH edge states in monolayer 1T′-TMDs. application/gzip text/markdown text/markdown https://doi.org/10.24435/materialscloud:cg-q0 oai:materialscloud.org:675 mcid:2020.161 eng Materials Cloud https://doi.org/10.1021/acs.jpclett.0c00859 https://pubs.acs.org/doi/abs/10.1021/acs.jpclett.0c00859 https://arxiv.org/abs/1907.12481 https://archive.materialscloud.org/communities/mcarchive https://doi.org/10.24435/materialscloud:mp-am info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode transition metal dichalcogenides quantum spin Hall effect edge states topological insulators 2D materials SNSF MARVEL ERC EPFL Controlling the quantum spin Hall edge states in two-dimensional transition metal dichalcogenides info:eu-repo/semantics/other