Thermoelectric phenomena in an antiferromagnetic helix: Role of electric field
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866910295635525632 |
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| author | Mondal, Kallol Ganguly, Sudin Maiti, Santanu K. |
| author_facet | Mondal, Kallol Ganguly, Sudin Maiti, Santanu K. |
| contents | The charge and spin-dependent thermoelectric responses are investigated on a single-helical molecule possessing a collinear antiferromagnetic spin arrangement with zero net magnetization in the presence of a transverse electric field. Both the short and long-range hopping scenarios are considered, which mimic biological systems like single-stranded DNA and $α$-protein molecules. A non-equilibrium Green's function formalism is employed following the Landauer-Buttiker prescription to study the thermoelectric phenomena. The detailed dependence of the basic thermoelectric quantities on helicity, electric field, temperature etc., are elaborated on, and the underlying physics is explained accordingly. The charge and spin \textit{figure of merits} are computed and compared critically. For a more accurate estimation, the phononic contribution towards thermal conductance is also included. The present proposition shows a favorable spin-dependent thermoelectric response compared to the charge counterpart. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_05582 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Thermoelectric phenomena in an antiferromagnetic helix: Role of electric field Mondal, Kallol Ganguly, Sudin Maiti, Santanu K. Mesoscale and Nanoscale Physics Disordered Systems and Neural Networks Computational Physics Quantum Physics The charge and spin-dependent thermoelectric responses are investigated on a single-helical molecule possessing a collinear antiferromagnetic spin arrangement with zero net magnetization in the presence of a transverse electric field. Both the short and long-range hopping scenarios are considered, which mimic biological systems like single-stranded DNA and $α$-protein molecules. A non-equilibrium Green's function formalism is employed following the Landauer-Buttiker prescription to study the thermoelectric phenomena. The detailed dependence of the basic thermoelectric quantities on helicity, electric field, temperature etc., are elaborated on, and the underlying physics is explained accordingly. The charge and spin \textit{figure of merits} are computed and compared critically. For a more accurate estimation, the phononic contribution towards thermal conductance is also included. The present proposition shows a favorable spin-dependent thermoelectric response compared to the charge counterpart. |
| title | Thermoelectric phenomena in an antiferromagnetic helix: Role of electric field |
| topic | Mesoscale and Nanoscale Physics Disordered Systems and Neural Networks Computational Physics Quantum Physics |
| url | https://arxiv.org/abs/2305.05582 |