Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/49707

TitleAngle resolved photoemission spectroscopy reveals spin charge separation in metallic MoSe2 grain boundary
Author(s)Ma, Yujing
Coy Diaz, Horacio
Avila, José
Chen, Chaoyu
Kalappattil, Vijaysankar
Das, Raja
Phan, Manh-Huong
Cadez, Tilen
Carmelo, José Manuel Pereira
Asensio, Maria C.
Batzill, Matthias
Issue date6-Feb-2017
PublisherNature Publishing Group
JournalNature Communications
CitationNature Communications 8, 14 231-14 242 (2017).
Abstract(s)Material line defects are one-dimensional structures but the search and proof of electron behaviour consistent with the reduced dimension of such defects has been so far unsuccessful. Here we show using angle resolved photoemission spectroscopy that twin-grain boundaries in the layered semiconductor MoSe2 exhibit parabolic metallic bands. The one-dimensional nature is evident from a charge density wave transition, whose periodicity is given by kF/p, consistent with scanning tunnelling microscopy and angle resolved photoemission measurements. Most importantly, we provide evidence for spin- and charge-separation, the hallmark of one-dimensional quantum liquids. Our studies show that the spectral line splits into distinctive spinon and holon excitations whose dispersions exactly follow the energy-momentum dependence calculated by a Hubbard model with suitable finite-range interactions. Our results also imply that quantum wires and junctions can be isolated in line defects of other transition metal dichalcogenides, which may enable quantum transport measurements and devices.
TypeArticle
URIhttp://hdl.handle.net/1822/49707
DOI10.1038/ncomms14231
ISSN2041-1723
e-ISSN2041-1723
Publisher versionThe original publication is available at www.nature.com/naturecommunications
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CDF - CEP - Artigos/Papers (with refereeing)

Files in This Item:
File Description SizeFormat 
17-MoSe2.pdf1,68 MBAdobe PDFView/Open

This item is licensed under a Creative Commons License Creative Commons

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID