Report
Thermoelectric transport of type-I, II, and III massless Dirac fermions in two-dimensional lattice model
| العنوان: | Thermoelectric transport of type-I, II, and III massless Dirac fermions in two-dimensional lattice model |
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| المؤلفون: | Mizoguchi, Tomonari, Matsuura, Hiroyasu, Ogata, Masao |
| المصدر: | Phys. Rev. B 105, 205203 (2022) |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We study longitudinal electric and thermoelectric transport coefficients of Dirac fermions on a simple lattice model where tuning of a single parameter enables us to change the type of Dirac cones from type-I to type-II. We pay particular attention to the behavior of the critical situation, i.e., the type-III Dirac cone. We find that the transport coefficients of the type-III Dirac fermions behave as the limiting case of neither the type-I nor type-II. On the one hand, the qualitative behaviors of the type-III case are similar to those of the type-I case. On the other hand, the transport coefficients do not change monotonically upon increasing the tilting; namely, the largest thermoelectric response is obtained not for the type-III case but for the optimally tilted type-I case. For the optimal case, the sizable transport coefficients are obtained; for example, the dimensionless figure of merit is 0.18. Comment: 12 pages, 11 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.105.205203 |
| URL الوصول: | http://arxiv.org/abs/2106.05435 |
| رقم الانضمام: | edsarx.2106.05435 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.105.205203 |
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