Sublinear transport in Kagome metals: Interplay of Dirac cones and Van Hove singularities
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866916210611847168 |
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| author | Peshcherenko, Nikolai Mao, Ning Felser, Claudia Zhang, Yang |
| author_facet | Peshcherenko, Nikolai Mao, Ning Felser, Claudia Zhang, Yang |
| contents | Kagome metals are known to host Dirac fermions and saddle point Van Hove singularities near Fermi level. With the minimal two-pocket model (Dirac cone + Van Hove singularity), we propose a semiclassical theory to explain the experimentally observed sublinear resistivity in Ni$_3$In and other Kagome metals. We derive the full semiclassical description of kinetic phenomena using Boltzmann equation, and demonstrate that internode electron-electron interaction leads to sublinear in $T$ scaling for both electrical and thermal transport at low temperatures. At higher temperatures above the Dirac node chemical potential, thermal and electric current dissipate through distinct scattering channels, making a ground for Wiedemann-Franz law violation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_11612 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Sublinear transport in Kagome metals: Interplay of Dirac cones and Van Hove singularities Peshcherenko, Nikolai Mao, Ning Felser, Claudia Zhang, Yang Strongly Correlated Electrons Materials Science Kagome metals are known to host Dirac fermions and saddle point Van Hove singularities near Fermi level. With the minimal two-pocket model (Dirac cone + Van Hove singularity), we propose a semiclassical theory to explain the experimentally observed sublinear resistivity in Ni$_3$In and other Kagome metals. We derive the full semiclassical description of kinetic phenomena using Boltzmann equation, and demonstrate that internode electron-electron interaction leads to sublinear in $T$ scaling for both electrical and thermal transport at low temperatures. At higher temperatures above the Dirac node chemical potential, thermal and electric current dissipate through distinct scattering channels, making a ground for Wiedemann-Franz law violation. |
| title | Sublinear transport in Kagome metals: Interplay of Dirac cones and Van Hove singularities |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2404.11612 |