Coulomb drag driven electron-hole bifluidity in doped graphene
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909979574796288 |
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| author | Paul, Dwaipayan Protik, Nakib H. |
| author_facet | Paul, Dwaipayan Protik, Nakib H. |
| contents | Motivated by the notion that a preponderance of Coulomb interactions might lead to hydrodynamics, we carry out an ab initio calculation of the charge carrier transport properties of the electron-hole plasma of doped graphene. We include both the phonon and Coulomb interactions within a momentum and band resolved Boltzmann transport formalism. We find that, under suitable conditions, the strong Coulomb drag effect induces effects like negative conductivity and joint electron-hole hydrodynamics (bifluidity) in the plasma. We also identify the exclusive electron or hole hydrodynamics. We find that there is a strong violation of the Wiedemann-Franz law in the low doped regimes. Our work elucidates the roles of the microscopic scattering mechanisms that drive these hydrodynamic phenomena. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_04602 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Coulomb drag driven electron-hole bifluidity in doped graphene Paul, Dwaipayan Protik, Nakib H. Materials Science Motivated by the notion that a preponderance of Coulomb interactions might lead to hydrodynamics, we carry out an ab initio calculation of the charge carrier transport properties of the electron-hole plasma of doped graphene. We include both the phonon and Coulomb interactions within a momentum and band resolved Boltzmann transport formalism. We find that, under suitable conditions, the strong Coulomb drag effect induces effects like negative conductivity and joint electron-hole hydrodynamics (bifluidity) in the plasma. We also identify the exclusive electron or hole hydrodynamics. We find that there is a strong violation of the Wiedemann-Franz law in the low doped regimes. Our work elucidates the roles of the microscopic scattering mechanisms that drive these hydrodynamic phenomena. |
| title | Coulomb drag driven electron-hole bifluidity in doped graphene |
| topic | Materials Science |
| url | https://arxiv.org/abs/2512.04602 |