Loading [Contrib]/a11y/accessibility-menu.js
Skip to main content

Temperature-driven topological transition in 1T'-MoTe2

Author(s): Berger, Ayelet Notis; Andrade, Erick; Kerelsky, Alexander; Edelberg, Drew; Li, Jian; et al

Download
To refer to this page use: http://arks.princeton.edu/ark:/88435/pr1542j86x
Abstract: The topology of Weyl semimetals requires the existence of unique surface states. Surface states have been visualized in spectroscopy measurements, but their connection to the topological character of the material remains largely unexplored. 1T'-MoTe2, presents a unique opportunity to study this connection. This material undergoes a phase transition at 240 K that changes the structure from orthorhombic (putative Weyl semimetal) to monoclinic (trivial metal), while largely maintaining its bulk electronic structure. Here, we show from temperature-dependent quasiparticle interference measurements that this structural transition also acts as a topological switch for surface states in 1T'-MoTe2. At low temperature, we observe strong quasiparticle scattering, consistent with theoretical predictions and photoemission measurements for the surface states in this material. In contrast, measurements performed at room temperature show the complete absence of the scattering wavevectors associated with the trivial surface states. These distinct quasiparticle scattering behaviors show that 1T'-MoTe2 is ideal for separating topological and trivial electronic phenomena via temperature-dependent measurements.
Publication Date: 16-Jan-2018
Electronic Publication Date: 16-Jan-2018
Citation: Berger, Ayelet Notis, Andrade, Erick, Kerelsky, Alexander, Edelberg, Drew, Li, Jian, Wang, Zhijun, Zhang, Lunyong, Kim, Jaewook, Zaki, Nader, Avila, Jose, Chen, Chaoyu, Asensio, Maria C, Cheong, Sang-Wook, Bernevig, Bogdan A, Pasupathy, Abhay N. (Temperature-driven topological transition in 1T'-MoTe2. npj Quantum Materials, 3 (1), 10.1038/s41535-017-0075-y
DOI: doi:10.1038/s41535-017-0075-y
EISSN: 2397-4648
Language: en
Type of Material: Journal Article
Journal/Proceeding Title: npj Quantum Materials
Version: Final published version. This is an open access article.



Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.