Pressure-induced redistribution in density of states and reemergence of superconductivity in AgSnSe2
Summary: The intricate relationship between superconductivity and disorder is a captivating subject within condensed matter physics. Strong disorder suppresses superconductivity and induces a superconductor-insulator transition. However, below a certain critical degree of disorder, the superconducti...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-05-01
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| Series: | iScience |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004225007035 |
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| Summary: | Summary: The intricate relationship between superconductivity and disorder is a captivating subject within condensed matter physics. Strong disorder suppresses superconductivity and induces a superconductor-insulator transition. However, below a certain critical degree of disorder, the superconductivity critical temperature (Tc) can be enhanced. Herein, we present evidence of pressure-induced reemergence of superconductivity in a strongly disordered 3D superconductor AgSnSe2. A structural phase transition from NaCl- to CsCl-type structure occurs, coinciding with the emergence of the second superconducting state. First-principles calculations suggest that the partial density of states in Se atoms exhibits a sharp elevation around the transition pressure, which is related to the secondary superconducting state. Our study illustrates AgSnSe2 as a promising platform to explore the comprehensive effects among disorder, high pressure, and superconductivity, offering insights for subsequent experimental and theoretical studies. |
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| ISSN: | 2589-0042 |