Quasiparticle interference of the Fermi arcs and surface-bulk connectivity of a Weyl semimetal

Hiroyuki Inoue, András Gyenis, Zhijun Wang, Jian Li, Seong Woo Oh, Shan Jiang, Ni Ni, B. Andrei Bernevig, Ali Yazdani

Research output: Contribution to journalArticle

97 Scopus citations

Abstract

Weyl semimetals host topologically protected surface states, with arced Fermi surface contours that are predicted to propagate through the bulk when their momentum matches that of the surface projections of the bulk's Weyl nodes. We used spectroscopic mapping with a scanning tunneling microscope to visualize quasiparticle scattering and interference at the surface of the Weyl semimetal TaAs. Our measurements reveal 10 different scattering wave vectors, which can be understood and precisely reproduced with a theory that takes into account the shape, spin texture, and momentum-dependent propagation of the Fermi arc surface states into the bulk. Our findings provide evidence that Weyl nodes act as sinks for electron transport on the surface of these materials.

Original languageEnglish (US)
Pages (from-to)1184-1187
Number of pages4
JournalScience
Volume351
Issue number6278
DOIs
StatePublished - Mar 11 2016

All Science Journal Classification (ASJC) codes

  • General

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