Resolving the pressure induced 'self-insertion' in skutterudite CoSb3
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| author | Wang, Bihan Pakhomova, Anna Khandarkhaeva, Saiana Pillaca, Mirtha Gille, Peter Ren, Zhe Lapkin, Dmitry Assalauova, Dameli Alexeev, Pavel Sergeev, Ilya Kulkarni, Satishkumar Weng, Tsu-Chien Sprung, Michael Liermann, Hanns-Peter Vartanyants, Ivan A. Glazyrin, Konstantin |
| author_facet | Wang, Bihan Pakhomova, Anna Khandarkhaeva, Saiana Pillaca, Mirtha Gille, Peter Ren, Zhe Lapkin, Dmitry Assalauova, Dameli Alexeev, Pavel Sergeev, Ilya Kulkarni, Satishkumar Weng, Tsu-Chien Sprung, Michael Liermann, Hanns-Peter Vartanyants, Ivan A. Glazyrin, Konstantin |
| contents | CoSb3, a skutterudite compound, is key in studying thermoelectric materials. Under compression, it undergoes a 'self-insertion' isostructural transition, redistributing large Sb atoms among crystallographic sites. We investigated CoSb3's structural stability up to 70 GPa using single crystal X-ray diffraction and high-resolution X-ray scattering, including Bragg Coherent Diffraction Imaging. We examined the material in three pressure transmitting media (PTMs), exploring how PTMs and nonhydrostatic stresses affect CoSb3. Notably, the 'self-insertion' transition may reduce or even make compressibility negative. Additionally, we report a previously unknown phase transformation from cubic Im-3 to trigonal R-3 above 40 GPa and discuss the phases' distinctive behaviors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_15105 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Resolving the pressure induced 'self-insertion' in skutterudite CoSb3 Wang, Bihan Pakhomova, Anna Khandarkhaeva, Saiana Pillaca, Mirtha Gille, Peter Ren, Zhe Lapkin, Dmitry Assalauova, Dameli Alexeev, Pavel Sergeev, Ilya Kulkarni, Satishkumar Weng, Tsu-Chien Sprung, Michael Liermann, Hanns-Peter Vartanyants, Ivan A. Glazyrin, Konstantin Materials Science Disordered Systems and Neural Networks Other Condensed Matter Strongly Correlated Electrons CoSb3, a skutterudite compound, is key in studying thermoelectric materials. Under compression, it undergoes a 'self-insertion' isostructural transition, redistributing large Sb atoms among crystallographic sites. We investigated CoSb3's structural stability up to 70 GPa using single crystal X-ray diffraction and high-resolution X-ray scattering, including Bragg Coherent Diffraction Imaging. We examined the material in three pressure transmitting media (PTMs), exploring how PTMs and nonhydrostatic stresses affect CoSb3. Notably, the 'self-insertion' transition may reduce or even make compressibility negative. Additionally, we report a previously unknown phase transformation from cubic Im-3 to trigonal R-3 above 40 GPa and discuss the phases' distinctive behaviors. |
| title | Resolving the pressure induced 'self-insertion' in skutterudite CoSb3 |
| topic | Materials Science Disordered Systems and Neural Networks Other Condensed Matter Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2408.15105 |