Synthesis and enhanced magnetoresistance of WTe<sub>2</sub> single crystals

POSTER

Abstract

Tungsten ditelluride (WTe2) is one of the low symmetry two-dimensional materials and exhibits extremely large magnetoresistance (XMR) below 10K. Understanding of novel properties in the materials is highlighted to induce unique properties at elevated temperature. Study of the temperature dependent MR is essential for real applications and deep insights. Most reported studies on fundamental issues are mainly achieved in exfoliated WTe2 (for reduced disorders) which is encapsulated with h-BN layers (for ideal interfaces). Here, we demonstrate synthesis and enhanced performances of the synthesized WTe2 single crystals. Tunable thickness and high crystallinity of the WTe2 are achieved using promoter-assisted CVD. A large MR of the CVD-grown WTe2 is experimentally realized.

*We acknowledge support from AOARD grant (co-funded with ONRG) FA2386-16-1-4009, Ministry of Science and Technology (MOST 108-2112-M-007-006-MY3, MOST 107-2923-M-007-002-MY3, MOST 106-2119-M-007-023-MY3, and MOST 105-2112-M-007-032-MY3), and Academia Sinica Research Program on Nanoscience and Nanotechnology (AS-iMATE-107-11), Taiwan.

Presenters

  • Yu-Ting Lin

    • National Tsing-Hua University
    • Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
    • National Taiwan Normal Univ

Authors

  • Yu-Ting Lin

    • National Tsing-Hua University
    • Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
    • National Taiwan Normal Univ

  • Chun-An Chen

    • Materials Science and Engineering, National Tsing Hua University
    • National Tsing-Hua University
    • Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan

  • Chen Po-Han

    • National Tsing-Hua University
    • Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
    • National Taiwan Normal Univ

  • I-Tung Chen

    • National Tsing-Hua University
    • Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
    • National Taiwan Normal Univ

  • Yi-Cheng Chiang

    • Materials Science and Engineering, National Tsing Hua University
    • National Tsing-Hua University
    • Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
    • National Taiwan Normal Univ

  • Yi-Hsien Lee

    • Materials Science and Engineering, National Tsing Hua University
    • National Tsing-Hua University
    • Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
    • National Taiwan Normal Univ