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Title: Engineering the Structural and Electronic Phases of MoTe2 through W Substitution

Journal Article · · Nano Letters
 [1];  [2];  [3];  [4];  [5];  [5];  [6]; ORCiD logo [7];  [2];  [2];  [8];  [9];  [9];  [9];  [1];  [1];  [1];  [10];  [11];  [12] more »;  [13];  [14];  [14];  [13];  [13];  [15];  [16];  [17];  [18];  [6];  [9];  [2]; ORCiD logo [19] « less
  1. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab); Florida State Univ., Tallahassee, FL (United States). Dept. of Physics
  2. Columbia Univ., New York, NY (United States). Dept. of Mechanical Engineering
  3. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Materials Science and Engineering
  4. Stanford Univ., CA (United States). Dept. of Chemistry
  5. Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics
  6. Columbia Univ., New York, NY (United States). Dept. of Physics
  7. Stanford Univ., CA (United States). Dept. of Materials Science and Engineering
  8. Columbia Univ., New York, NY (United States). Materials Research Science and Engineering Center; State Univ. of New York (SUNY), New York, NY (United States). Fashion Inst. of Technology (FIT), Dept. of Science and Mathematics
  9. Army Research Lab., Adelphi, MD (United States). Sensors and Electronic Devices Directorate
  10. Stanford Univ., CA (United States). Dept. of Applied Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Photon Ultrafast Laser Science and Engineering Inst. (PULSE)
  11. Columbia Univ., New York, NY (United States). Dept. of Electrical Engineering
  12. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  13. Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics, and Inst. of Physics
  14. Renmin Univ. of China, Beijing (China). Dept. of Physics
  15. Columbia Univ., New York, NY (United States). Dept. of Electrical Engineering; Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics
  16. Columbia Univ., New York, NY (United States). Dept. of Chemistry; Columbia Univ., New York, NY (United States). Columbia Nano Initiative
  17. Stanford Univ., CA (United States). Dept. of Materials Science and Engineering; SLAC National Accelerator Lab., Menlo Park, CA (United States). Photon Ultrafast Laser Science and Engineering Inst. (PULSE); SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
  18. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Mechanical Science and Engineering
  19. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)

MoTe2 is an exfoliable transition metal dichalcogenide (TMD) that crystallizes in three symmetries: the semiconducting trigonal-prismatic 2H- or α-phase, the semimetallic and monoclinic 1T'- or β-phase, and the semimetallic orthorhombic γ-structure. The 2H-phase displays a band gap of ~1 eV making it appealing for flexible and transparent optoelectronics. The γ-phase is predicted to possess unique topological properties that might lead to topologically protected nondissipative transport channels. Recently, it was argued that it is possible to locally induce phase-transformations in TMDs, through chemical doping, local heating, or electric-field to achieve ohmic contacts or to induce useful functionalities such as electronic phase-change memory elements. The combination of semiconducting and topological elements based upon the same compound might produce a new generation of high performance, low dissipation optoelectronic elements. Here, we show that it is possible to engineer the phases of MoTe2 through W substitution by unveiling the phase-diagram of the Mo1–xWxTe2 solid solution, which displays a semiconducting to semimetallic transition as a function of x. We find that a small critical W concentration xc ~ 8% stabilizes the γ-phase at room temperature. Lastly, this suggests that crystals with x close to xc might be particularly susceptible to phase transformations induced by an external perturbation, for example, an electric field. Photoemission spectroscopy, indicates that the γ-phase possesses a Fermi surface akin to that of WTe2.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704; 2013CB921700; 2015CB921300; W911NF-11-1-0362; GBMF4545; AC02-76SF00515; FA9550-11-1-0010; FA9550-14-1-0268; NA0002135; FG02-04ER46157; 11234014; 11274381; 11474340; DMR-1610110; XDB07000000; LPDS 2013-13
OSTI ID:
1353195
Journal Information:
Nano Letters, Vol. 17, Issue 3; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 111 works
Citation information provided by
Web of Science

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Tunable large-area phase reversion in chemical vapor deposited few-layer MoTe 2 films journal January 2019
A roadmap for electronic grade 2D materials journal January 2019
Re Doping in 2D Transition Metal Dichalcogenides as a New Route to Tailor Structural Phases and Induced Magnetism journal October 2017
Phase-Engineered Weyl Semi-Metallic Mo x W 1-x Te 2 Nanosheets as a Highly Efficient Electrocatalyst for Dye-Sensitized Solar Cells journal January 2019
Investigation on the phase-transition-induced hysteresis in the thermal transport along the c-axis of MoTe2 journal June 2017
The structural phases and vibrational properties of Mo 1−x W x Te 2 alloys journal August 2017
Electronic, vibrational, elastic, and piezoelectric properties of monolayer Janus MoSTe phases: A first-principles study journal July 2019
Crystal phase control in two-dimensional materials journal September 2018
Novel structured transition metal dichalcogenide nanosheets journal January 2018
Tailoring Surface Properties via Functionalized Hydrofluorinated Graphene Compounds journal August 2019
Atomic Insights into Phase Evolution in Ternary Transition-Metal Dichalcogenides Nanostructures journal May 2018
Bulk Fermi surface of the Weyl type-II semimetallic candidate γ MoTe 2 journal October 2017
Two-Dimensional MoxW1−xS2 Graded Alloys: Growth and Optical Properties journal August 2018
Strategies on Phase Control in Transition Metal Dichalcogenides journal August 2018
Theoretical potential for low energy consumption phase change memory utilizing electrostatically-induced structural phase transitions in 2D materials journal January 2018
Prediction of low energy phase transition in metal doped MoTe 2 from first principle calculations journal May 2019
Experimental progress on layered topological semimetals journal April 2019
Electronic Structure Control of Tungsten Oxide Activated by Ni for Ultrahigh-Performance Supercapacitors journal April 2018
Origin of magnetoresistance suppression in thin γ MoT e 2 journal June 2018
Band structure tailoring in ZrSe 2 single crystal via trace rhenium intercalation journal November 2019
Doping of Two-Dimensional Semiconductors: A Rapid Review and Outlook journal January 2019
Dimensionality-driven orthorhombic MoT e 2 at room temperature journal January 2018
Mechanical control of crystal symmetry and superconductivity in Weyl semimetal MoTe 2 journal July 2018
Realization of vertical metal semiconductor heterostructures via solution phase epitaxy journal September 2018
Metallicity of 2H-MoS 2 induced by Au hybridization journal February 2020
Recent progress of TMD nanomaterials: phase transitions and applications journal January 2020
Phase transition and electronic structure evolution of MoTe 2 induced by W substitution journal October 2018
Substrate temperature dependence of the crystalline quality for the synthesis of pure-phase MoTe 2 on graphene/6 H -SiC(0001) by molecular beam epitaxy journal December 2019
Solution synthesis of few-layer WTe 2 and Mo x W 1−x Te 2 nanostructures journal January 2017
Exciton States in Monolayer MoSe 2 and MoTe 2 Probed by Upconversion Spectroscopy journal September 2018
Phase-Engineered Growth of Ultrathin InSe Flakes by Chemical Vapor Deposition for High-Efficiency Second Harmonic Generation journal September 2018
Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications journal January 2020
Structural phase transition in monolayer MoTe2 driven by electrostatic doping journal October 2017
Effect of thermal conductivity of substrate on laser‐induced phase transition of MoTe 2 journal January 2019
Layer-dependent spin-orbit torques generated by the centrosymmetric transition metal dichalcogenide β MoTe 2 journal November 2019
High unsaturated room-temperature magnetoresistance in phase-engineered Mo x W 1−x Te 2+δ ultrathin films journal January 2019
Doping engineering and functionalization of two-dimensional metal chalcogenides journal January 2019
Phase Transition and Superconductivity Enhancement in Se‐Substituted MoTe 2 Thin Films journal October 2019
Realization of vertical metal semiconductor heterostructures via solution phase epitaxy. text January 2018
Prediction of low energy phase transition in metal doped MoTe$_2$ from first principle calculations text January 2018
Experimental Progress on Layered Topological Semimetals text January 2019
Phase evolution and superconductivity enhancement in Se-substituted MoTe$_2$ thin films text January 2019