Preprint FZJ-2023-05765

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png
Doping-Induced Electronic and Structural Phase Transition in the Bulk Weyl Semimetal Mo1-xWxTe2

 ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;

2023
arXiv

arXiv () [10.48550/ARXIV.2310.10593]

This record in other databases:

Please use a persistent id in citations: doi:  doi:

Abstract: A comprehensive study of the electronic and structural phase transition from 1T` to Td in the bulk Weyl semimetal Mo1-xWxTe2 at different doping concentrations has been carried out using time-of-flight momentum microscopy (including circular and linear dichroism), X-ray photoelectron spectroscopy (XPS), X-ray photoelectron diffraction (XPD), X-ray diffraction (XRD), angle-resolved Raman spectroscopy, transport measurements, density functional theory (DFT) and Kikuchi pattern calculations. High-resolution angle-resolved photoemission spectroscopy (ARPES) at 20 K reveals surface electronic states, which are indicative of topological Fermi arcs. Their dispersion agrees with the position of Weyl points predicted by DFT calculations based on the experimental crystal structure of our samples determined by XRD. Raman spectroscopy confirms the inversion symmetry breaking for the Td -phase, which is a necessary condition for the emergence of topological states. Transport measurements show that increasing the doping concentration from 2 to 9% leads to an increase in the temperature of the phase transition from 1T` to Td from 230 K to 270 K. Magnetoresistance and longitudinal elastoresistance show significantly increased values in the Td -phase due to stimulated inter-pocket electron backscattering. The results demonstrate the close relationship between electronic properties and elastic deformations in MoTe2.

Keyword(s): Materials Science (cond-mat.mtrl-sci) ; FOS: Physical sciences


Contributing Institute(s):
  1. Quanten-Theorie der Materialien (IAS-1)
  2. Quanten-Theorie der Materialien (PGI-1)
Research Program(s):
  1. 5211 - Topological Matter (POF4-521) (POF4-521)
  2. DFG project 390534769 - EXC 2004: Materie und Licht für Quanteninformation (ML4Q) (390534769) (390534769)

Appears in the scientific report 2023
Database coverage:
OpenAccess
Click to display QR Code for this record

The record appears in these collections:
Institute Collections > IAS > IAS-1
Document types > Reports > Preprints
Institute Collections > PGI > PGI-1
Workflow collections > Public records
Publications database
Open Access

 Record created 2023-12-20, last modified 2024-02-26


OpenAccess:
Download fulltext PDF
Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)