First-order phase transition between superconductivity and charge/spin-density wave as the reason of their coexistence in organic metals
The interplay between superconductivity (SC) and spin/charge density wave (DW) in organic metals shows many similarities to high-\(T_c\) superconductors. It also contains many puzzles, for example, the anisotropic SC onset observed and the severalfold increase of the upper critical field \(H_{c2}\)...
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| creator | Seidov, Seidali S Kochev, Vladislav D Grigoriev, Pavel D |
| description | The interplay between superconductivity (SC) and spin/charge density wave (DW) in organic metals shows many similarities to high-\(T_c\) superconductors. It also contains many puzzles, for example, the anisotropic SC onset observed and the severalfold increase of the upper critical field \(H_{c2}\) in the coexistence region, as well as the microscopic origin of SC/DW phase separation there. In this paper, by the direct calculation of the Landau expansion for DW free energy, we argue that the phase transition between DW and metallic/SC phase in organic superconductors goes by first order at low enough temperature, which explains the spatial segregation of DW and SC at large length scale, consistent with experimental observations. This first-order phase transition is not directly related to SC and happens even above the SC transition temperature. |
| doi_str_mv | 10.48550/arxiv.2305.06957 |
| format | Article |
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| subjects | Charge density waves Critical field (superconductivity) Free energy Organic superconductors Phase separation Phase transitions Physics - Strongly Correlated Electrons Physics - Superconductivity Spin density waves Superconductivity Transition temperature |
| title | First-order phase transition between superconductivity and charge/spin-density wave as the reason of their coexistence in organic metals |
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