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Title: Large spin-orbit coupling and helical spin textures in 2D heterostructure [Pb 2BiS 3][AuTe 2]

Two-dimensional heterostructures with strong spin-orbit coupling have direct relevance to topological quantum materials and potential applications in spin-orbitronics. In this work, we report on novel quantum phenomena in [Pb 2BiS 3][AuTe 2], a new 2D strong spin-orbit coupling heterostructure system. Transport measurements reveal the spin-related carrier scattering is at odds with the Abrikosov-Gorkov model due to strong spin-orbit coupling. This is consistent with our band structure calculations which reveal a large spin-orbit coupling gap of ε so = 0.21 eV. Furthermore, the band structure is also characterized by helical-like spin textures which are mainly induced by strong spin-orbit coupling and the inversion symmetry breaking in the heterostructure system.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [3] ;  [3] ;  [3] ;  [1]
  1. Argonne National Lab. (ANL), Lemont, IL (United States); Korea Research Institute of Chemical Technology, Daejeon (Korea)
  2. Northwestern Univ., Evanston, IL (United States)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
  4. Argonne National Lab. (ANL), Lemont, IL (United States); Northern Illinois Univ., DeKalb, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Materials Sciences and Engineering Division; Korea Research Institute of Chemical Technology (KRICT)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; helical spin texture; heterostructure; spin-orbit coupling; electronic devices; electronic properties and materials; two-dimensional materials
OSTI Identifier:
1350085