Evidence for topological type-II Weyl semimetal WTe2

Peng Li, Yan Wen, Xin He, Qiang Zhang, Chuan Xia, Zhi-Ming Yu, Shengyuan A. Yang, Zhiyong Zhu, Husam N. Alshareef and Xi-Xiang Zhang ()
Additional contact information
Peng Li: Physical Science and Engineering Division (PSE)
Yan Wen: Physical Science and Engineering Division (PSE)
Xin He: Physical Science and Engineering Division (PSE)
Qiang Zhang: Physical Science and Engineering Division (PSE)
Chuan Xia: Physical Science and Engineering Division (PSE)
Zhi-Ming Yu: Singapore University of Technology and Design
Shengyuan A. Yang: Singapore University of Technology and Design
Zhiyong Zhu: KAUST Supercomputing Laboratory (KSL)
Husam N. Alshareef: Physical Science and Engineering Division (PSE)
Xi-Xiang Zhang: Physical Science and Engineering Division (PSE)

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Recently, a type-II Weyl fermion was theoretically predicted to appear at the contact of electron and hole Fermi surface pockets. A distinguishing feature of the surfaces of type-II Weyl semimetals is the existence of topological surface states, so-called Fermi arcs. Although WTe2 was the first material suggested as a type-II Weyl semimetal, the direct observation of its tilting Weyl cone and Fermi arc has not yet been successful. Here, we show strong evidence that WTe2 is a type-II Weyl semimetal by observing two unique transport properties simultaneously in one WTe2 nanoribbon. The negative magnetoresistance induced by a chiral anomaly is quite anisotropic in WTe2 nanoribbons, which is present in b-axis ribbon, but is absent in a-axis ribbon. An extra-quantum oscillation, arising from a Weyl orbit formed by the Fermi arc and bulk Landau levels, displays a two dimensional feature and decays as the thickness increases in WTe2 nanoribbon.

Date: 2017
References: Add references at CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.nature.com/articles/s41467-017-02237-1 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-02237-1

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-017-02237-1

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().