Pressure-induced superconductivity in topological insulator Ge2Bi2Te5 and the evolution with Mn doping
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866912843817811968 |
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| author | Tian, Shangjie Wang, Qi Cao, Yuqing Ma, Ying Zhang, Xiao Qi, Yanpeng Lei, Hechang Wang, Shouguo |
| author_facet | Tian, Shangjie Wang, Qi Cao, Yuqing Ma, Ying Zhang, Xiao Qi, Yanpeng Lei, Hechang Wang, Shouguo |
| contents | Introducing superconductivity (SC) or magnetism into topological insulators (TIs) can give rise to novel quantum states and exotic physical phenomena. Here, we report a high-pressure transport study on the TI Ge2Bi2Te5 and its Mn-doped counterparts. The application of pressure induces a SC in Ge2Bi2Te5, which shows a dome-shape phase diagram with the maximum Tc of 7.6 K at 23 GPa. Doping Mn into Ge2Bi2Te5 introduces an antiferromagnetic order at ambient pressure and strongly weakens the pressure-induced SC, demonstrating that magnetism and SC compete in this material system. Present study provides a new platform for investigating the interplay among band topology, magnetism, and SC. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_16831 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Pressure-induced superconductivity in topological insulator Ge2Bi2Te5 and the evolution with Mn doping Tian, Shangjie Wang, Qi Cao, Yuqing Ma, Ying Zhang, Xiao Qi, Yanpeng Lei, Hechang Wang, Shouguo Superconductivity Strongly Correlated Electrons Introducing superconductivity (SC) or magnetism into topological insulators (TIs) can give rise to novel quantum states and exotic physical phenomena. Here, we report a high-pressure transport study on the TI Ge2Bi2Te5 and its Mn-doped counterparts. The application of pressure induces a SC in Ge2Bi2Te5, which shows a dome-shape phase diagram with the maximum Tc of 7.6 K at 23 GPa. Doping Mn into Ge2Bi2Te5 introduces an antiferromagnetic order at ambient pressure and strongly weakens the pressure-induced SC, demonstrating that magnetism and SC compete in this material system. Present study provides a new platform for investigating the interplay among band topology, magnetism, and SC. |
| title | Pressure-induced superconductivity in topological insulator Ge2Bi2Te5 and the evolution with Mn doping |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2601.16831 |