Pressure-induced superconductivity, amorphization, and topological phase transitions in the topological semimetal MoP4
Chutong Zhang, Xiangzhuo Xing, Song Huang, Xiao Tang, Linchao Yu, Na Zuo, Bin Li, Xiaolei Yi, Yan Meng, Xiaoran Zhang, Bingchao Yang, Xin Chen, Xiaofeng Xu, Xiaobing Liu
DOI 10.1103/PhysRevB.111.L140502 · Physical Review B
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Abstract
The application of pressure to induce superconductivity in topological materials has emerged as an effective approach for discovering potential topological superconductors. In this article we report pressure-induced superconductivity, amorphization, and topological quantum phase transitions in the topological semimetal MoP4. Our results demonstrate that MoP4 undergoes an irreversible amorphous phase transition at approximately 60 GPa, with superconductivity emerging around 34 GPa. Notably, accompanied with the amorphous phase transition, pronounced superconducting fluctuations due to the local formation of Cooper pairs are observed below a characteristic temperature, Tsf. Both superconducting transition temperature Tc and Tsf increase monotonically with pressure, reaching maximum values of around 9 and 20 K, respectively. Furthermore, first-principles calculations reveal a sequence of pressure-induced topological phase transitions whereby the system evolves from a strong topological semimetal to a weak topological metal, and finally to a trivial state. These findings suggest that MoP4 serves as an ideal platform for probing the interplay between superconductivity, amorphization, and topological properties under pressure.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MoP4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9 | 61.8 GPa | onset |
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