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Volume 32 Issue 6
Dec 2018
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Chinese Journal of High Pressure Physics  > 2018  >  32(6): 061101.
GU Kemin, YAN Hao, KE Feng, DENG Wen, XU Jianing, CHEN Bin. Pressure-Induced Electrical Transport Anomaly, Structure Evolution and Vibration Change in Layered Material 1T-TiTe2[J]. Chinese Journal of High Pressure Physics, 2018, 32(6): 061101. doi: 10.11858/gywlxb.20180568
Citation: GU Kemin, YAN Hao, KE Feng, DENG Wen, XU Jianing, CHEN Bin. Pressure-Induced Electrical Transport Anomaly, Structure Evolution and Vibration Change in Layered Material 1T-TiTe2[J]. Chinese Journal of High Pressure Physics, 2018, 32(6): 061101. doi: 10.11858/gywlxb.20180568
shu

Pressure-Induced Electrical Transport Anomaly, Structure Evolution and Vibration Change in Layered Material 1T-TiTe2

doi: 10.11858/gywlxb.20180568
  • 1.

    Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China

  • 2.

    Graduate School, China Academy of Engineering Physics, Beijing 100088, China

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  • Author Bio:

    GU Kemin(1992-), male, master, major in condensed matter physics. E-mail:Kemin.gu@hpstar.ac.cn

  • Corresponding author: CHEN Bin(1950-), male, Ph. D, one thousand talent, expertise in material science. E-mail:binchen@hpstar.ac.cn
  • Received Date: 21 May 2018
  • Rev Recd Date: 04 Jun 2018
    Abstract
  • We conducted a systematic study on pressure-dependent electrical, vibrational and structural properties of titanium ditelluride up to 43.4 GPa. The room-temperature resistivity shows a series of anomaly changes at around 6, 13 and 22 GPa. Low-temperature resistance measurement was also employed to better understand the electronic structure and we observed the superconductivity at about 6 GPa successfully. Raman spectroscopy and X-ray diffraction (XRD) experiment show a topological phase transition at about 6 GPa followed by a structure phase transition at about 13 GPa. The P3m1 to C2/m phase transition begins from about 13 GPa and completes at about 22 GPa. The XRD data correlate well with our electronic transport measurement result, which shows a pressure-induced structure evolution and electronic structure modification. Therefore titanium ditelluride may provide us with a new perspective to understand the high pressure behaviors in transition metal dichalcogenides.

     

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