Comparative high-pressure structural and electrical transport properties study of thermoelectric (Bi1-xSbx)2Te3 compounds
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arXiv
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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909532335112192 |
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| author | Wei, Chenxin Muhamed, Dawod Lu, Wenting Zou, Haikai Sun, Baihong Feng, Shiyu Zhang, Qian Su, Zegeng Kadobayashi, Hirokazu Kunz, Martin Wang, Bihang Ahmad, Azkar Saeed Amouyal, Yaron Stavrou, Elissaios |
| author_facet | Wei, Chenxin Muhamed, Dawod Lu, Wenting Zou, Haikai Sun, Baihong Feng, Shiyu Zhang, Qian Su, Zegeng Kadobayashi, Hirokazu Kunz, Martin Wang, Bihang Ahmad, Azkar Saeed Amouyal, Yaron Stavrou, Elissaios |
| contents | Thermoelectric (Bi1-x Sbx)2Te3 (BST-x) compounds with x=0.2, 0.7 and 0.9 have been studied using synchrotron angle-dispersive powder x-ray diffraction in a diamond anvil cell up to 25 GPa (at room temperature). The results clearly indicate that all compounds of this study follow a similar structural evolution with the one of pure Bi2Te3 and Sb2Te3 under pressure. From the comparison between the critical pressures of the corresponding phase transitions, a clear trend of increasing critical pressure for the transition to the disordered solid-solution BCC phase was observed with the increase of Sb concentration. In the case of the BST-0.7, an extended stability of the solid-solution BCC phase up to, at least, 180 GPa was observed. Finally, electrical transport properties measurements under pressure for BST-0.7, document a reversible pressure-induced metallization above 12 GPa. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_06562 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Comparative high-pressure structural and electrical transport properties study of thermoelectric (Bi1-xSbx)2Te3 compounds Wei, Chenxin Muhamed, Dawod Lu, Wenting Zou, Haikai Sun, Baihong Feng, Shiyu Zhang, Qian Su, Zegeng Kadobayashi, Hirokazu Kunz, Martin Wang, Bihang Ahmad, Azkar Saeed Amouyal, Yaron Stavrou, Elissaios Materials Science Thermoelectric (Bi1-x Sbx)2Te3 (BST-x) compounds with x=0.2, 0.7 and 0.9 have been studied using synchrotron angle-dispersive powder x-ray diffraction in a diamond anvil cell up to 25 GPa (at room temperature). The results clearly indicate that all compounds of this study follow a similar structural evolution with the one of pure Bi2Te3 and Sb2Te3 under pressure. From the comparison between the critical pressures of the corresponding phase transitions, a clear trend of increasing critical pressure for the transition to the disordered solid-solution BCC phase was observed with the increase of Sb concentration. In the case of the BST-0.7, an extended stability of the solid-solution BCC phase up to, at least, 180 GPa was observed. Finally, electrical transport properties measurements under pressure for BST-0.7, document a reversible pressure-induced metallization above 12 GPa. |
| title | Comparative high-pressure structural and electrical transport properties study of thermoelectric (Bi1-xSbx)2Te3 compounds |
| topic | Materials Science |
| url | https://arxiv.org/abs/2503.06562 |