title: Composition and temperature-dependent phase transition in miscible Mo1-xWxTe2single crystals.
abstract: Transition metal dichalcogenides (TMDs) WTe2and MoTe2with orthorhombic Td phase, being potential candidates as type-II Weyl semimetals, are attracted much attention recently. Here we synthesized a series of miscible Mo1-xWxTe2single crystals by bromine vapor transport method. Composition-dependent X-ray diffraction and Raman spectroscopy, as well as composition and temperature-dependent resistivity prove that the tunable crystal structure (from hexagonal (2H), monoclinic (β) to orthorhombic (Td) phase) can be realized by increasing W content in Mo1-xWxTe2. Simultaneously the electrical property gradually evolves from semiconductor to semimetal behavior. Temperature-dependent Raman spectroscopy proves that temperature also can induce the structural phase transition from β to Td phase in Mo1-xWxTe2crystals. Based on aforementioned characterizations, we map out the temperature and composition dependent phase diagram of Mo1-xWxTe2system. In addition, a series of electrical parameters, such as carrier type, carrier concentration and mobility, have also been presented. This work offers a scheme to accurately control structural phase in Mo1-xWxTe2system, which can be used to explore type-II Weyl semimetal, as well as temperature/composition controlled topological phase transition therein.
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Materials Science and Engineering, Nanjing University, Nanjing 210093 China.
authors.forename: Yang-Yang
authors.initials: YY
authors.lastname: Lv
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Materials Science and Engineering, Nanjing University, Nanjing 210093 China.
authors.forename: Lin
authors.initials: L
authors.lastname: Cao
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Physics, Nanjing University, Nanjing 210093 China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Li
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Materials Science and Engineering, Nanjing University, Nanjing 210093 China.
authors.forename: Bin-Bin
authors.initials: BB
authors.lastname: Zhang
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Physics, Nanjing University, Nanjing 210093 China.
authors.forename: Kang
authors.initials: K
authors.lastname: Wang
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Materials Science and Engineering, Nanjing University, Nanjing 210093 China.
authors.lastname: Bin Pang
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Physics, Nanjing University, Nanjing 210093 China.
authors.forename: Ligang
authors.initials: L
authors.lastname: Ma
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Materials Science and Engineering, Nanjing University, Nanjing 210093 China.
authors.forename: Dajun
authors.initials: D
authors.lastname: Lin
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Materials Science and Engineering, Nanjing University, Nanjing 210093 China.
authors.forename: Shu-Hua
authors.initials: SH
authors.lastname: Yao
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Materials Science and Engineering, Nanjing University, Nanjing 210093 China.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhou
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Physics, Nanjing University, Nanjing 210093 China.
authors.forename: Y B
authors.initials: YB
authors.lastname: Chen
authors.affiliation: Institute of materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003 China.
authors.forename: Song-Tao
authors.initials: ST
authors.lastname: Dong
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Materials Science and Engineering, Nanjing University, Nanjing 210093 China.|Institute of Advanced Materials (IAM) &Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 211800 China.
authors.forename: Wenchao
authors.initials: W
authors.lastname: Liu
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Materials Science and Engineering, Nanjing University, Nanjing 210093 China.
authors.forename: Ming-Hui
authors.initials: MH
authors.lastname: Lu
authors.affiliation: School of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, China.|State Key Laboratory of Low Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter and Department of Physics, Tsinghua University, Beijing 100084, China.
authors.forename: Yulin
authors.initials: Y
authors.lastname: Chen
authors.affiliation: National Laboratory of Solid State Microstructures &Department of Materials Science and Engineering, Nanjing University, Nanjing 210093 China.|Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, 210093 China.
authors.forename: Yan-Feng
authors.initials: YF
authors.lastname: Chen