Thermopower in an anisotropic two-dimensional Weyl semimetal
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2018
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| _version_ | 1866917608504164352 |
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| author | Mandal, Ipsita Saha, Kush |
| author_facet | Mandal, Ipsita Saha, Kush |
| contents | We investigate the generation of an electric current from a temperature gradient in a two-dimensional Weyl semimetal with anisotropy, in both the presence and absence of a quantizing magnetic field. We show that the anisotropy leads to doping dependences of thermopower and thermal conductivities which are different from those in isotropic Dirac materials. Additionally, we find that a quantizing magnetic field in such systems leads to an interesting magnetic field dependence of the longitudinal thermopower, resulting in unsaturated thermoelectric coefficients. Thus the results presented here will serve as a guide to achieving high thermopower and a thermoelectric figure-of-merit in graphene-based materials, as well as organic conductors such as $α$-(BEDT-TTF)$_2$I$_3$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1811_04952 |
| institution | arXiv |
| publishDate | 2018 |
| record_format | arxiv |
| spellingShingle | Thermopower in an anisotropic two-dimensional Weyl semimetal Mandal, Ipsita Saha, Kush Mesoscale and Nanoscale Physics Strongly Correlated Electrons We investigate the generation of an electric current from a temperature gradient in a two-dimensional Weyl semimetal with anisotropy, in both the presence and absence of a quantizing magnetic field. We show that the anisotropy leads to doping dependences of thermopower and thermal conductivities which are different from those in isotropic Dirac materials. Additionally, we find that a quantizing magnetic field in such systems leads to an interesting magnetic field dependence of the longitudinal thermopower, resulting in unsaturated thermoelectric coefficients. Thus the results presented here will serve as a guide to achieving high thermopower and a thermoelectric figure-of-merit in graphene-based materials, as well as organic conductors such as $α$-(BEDT-TTF)$_2$I$_3$. |
| title | Thermopower in an anisotropic two-dimensional Weyl semimetal |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/1811.04952 |