The Dimer Model for k-phase Organic Superconductors
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
1997
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| _version_ | 1866917847902453760 |
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| author | Visentini, G. Painelli, A. Girlando, A. Fortunelli, A. |
| author_facet | Visentini, G. Painelli, A. Girlando, A. Fortunelli, A. |
| contents | We prove that the upper electronic bands of k-phase BEDT-TTF salts are adequately modeled by an half-filled tight-binding lattice with one site per cell. The band parameters are derived from recent ab-initio calculations, getting a very simple but extremely accurate one-electron picture. This picture allows us to solve the BCS gap equation adopting a real-space pairing potential. Comparison of the calculated superconducting properties with the experimental data points to isotropic s_0-pairing. Residual many-body or phonon-mediated interactions offer a plausible explanation of the large variety of physical properties observed in k-phase BEDT-TTF salts. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_cond_mat_9706010 |
| institution | arXiv |
| publishDate | 1997 |
| record_format | arxiv |
| spellingShingle | The Dimer Model for k-phase Organic Superconductors Visentini, G. Painelli, A. Girlando, A. Fortunelli, A. Superconductivity We prove that the upper electronic bands of k-phase BEDT-TTF salts are adequately modeled by an half-filled tight-binding lattice with one site per cell. The band parameters are derived from recent ab-initio calculations, getting a very simple but extremely accurate one-electron picture. This picture allows us to solve the BCS gap equation adopting a real-space pairing potential. Comparison of the calculated superconducting properties with the experimental data points to isotropic s_0-pairing. Residual many-body or phonon-mediated interactions offer a plausible explanation of the large variety of physical properties observed in k-phase BEDT-TTF salts. |
| title | The Dimer Model for k-phase Organic Superconductors |
| topic | Superconductivity |
| url | https://arxiv.org/abs/cond-mat/9706010 |