Structural phase transition in Bi2Te3 under high pressure |
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| Authors: | A Nakayama M Einaga Y Tanabe S Nakano F Ishikawa Y Yamada |
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| Institution: | 1. Center for Transdisciplinary Research, Niigata University , 8050 Ikarashi 2-no-cho, Niigata, 950-2181, Japan nakayama-a@phys.sc.niigata-u.ac.jp;3. Graduate School of Science and Technology, Niigata University , 8050 Ikarashi 2-no-cho, Niigata, 950-2181, Japan;4. National Institute for Materials Science (NIMS) , Tsukuba, 305-0044, Japan;5. Department of Physics, Faculty of Science , Niigata University , 8050 Ikarashi 2-no-cho, Niigata, 950-2181, Japan |
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| Abstract: | Structural change in Bi2Te3 under high pressure up to 16.6 GPa has been studied by powder x-ray diffraction. We observed two times of phase transitions at room temperature at the pressures of 8 and 14 GPa, respectively. According to our preliminary result on electrical resistance, it is reasonable to suppose that superconducting transition with T c =2.8 K at the pressures of 10.2 GPa is observed in phase II. On the other hand, we found anomalies of the pressure dependences of lattice parameters and volume at around 2 GPa, which probably means the change in electrical structure on the Fermi surface. |
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| Keywords: | pressure-induced phase transition superconductor thermoelectric material high-pressure x-ray diffraction hydrostatic pressure |
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