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Title: Coexistence of superconductivity and commensurate charge density wave in 4H{sub b}-TaS{sub 2−x}Se{sub x} single crystals

The transition-metal dichalcogenides, a family of graphene-like two-dimensional (2D) materials, exhibit exciting properties for potential applications and fundamental researches. We successfully fabricated a new series of 4H{sub b}-TaS{sub 2−x}Se{sub x} (0 ≤ x ≤ 1.5) single crystals by chemical vapor transport technique. This is the first time to demonstrate the coexistence of superconductivity and commensurate charge density wave (CCDW) in 4H{sub b}-TaS{sub 2−x}Se{sub x} (0 ≤ x ≤ 1.5). The evolution of the electronic states tuned by Se-doping are also exhibited in the phase diagram. Taking into account the special crystal structure of 4H{sub b}-TaS{sub 2−x}Se{sub x} (0 ≤ x ≤ 1.5), we draw a conclusion that the H- and T-layers play a crucial role to dominate the state of superconductivity and CCDW, respectively.
Authors:
; ; ;  [1] ;  [2] ;  [1] ;  [3] ;  [3]
  1. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China)
  2. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054 (China)
  3. (China)
Publication Date:
OSTI Identifier:
22275630
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CHARGE DENSITY; CONCENTRATION RATIO; CRYSTAL STRUCTURE; ELECTRONIC STRUCTURE; GRAPHENE; LAYERS; MONOCRYSTALS; PHASE DIAGRAMS; SUPERCONDUCTIVITY; SUPERCONDUCTORS; TANTALUM SELENIDES; TANTALUM SULFIDES; VAPORS