Intrinsic Nernst Effect from Berry Curvature in Superconductors
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866911186038030336 |
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| author | Hsieh, Tzu-Chi Xiao, Cong Hsu, Yi-Ting |
| author_facet | Hsieh, Tzu-Chi Xiao, Cong Hsu, Yi-Ting |
| contents | The Nernst effect in superconductors is typically linked to fluctuating Cooper pairs above $T_c$ or vortex motion below $T_c$. We show instead that Berry curvature of Bogoliubov quasiparticles can generate an intrinsic Nernst response in a clean, vortex-free superconducting state. Focusing on two-dimensional (2D) systems with Ising spin-orbit coupling, relevant to transition-metal dichalcogenides, we identify two regimes: an intervalley $s$-wave paired state where a weak magnetic field activates the effect, and an intravalley chiral $p$-wave paired state that exhibits a spontaneous charge or spin Nernst response without a field. We propose an experimental setup that circumvents screening and provide estimates of the signal magnitude. Our results establish the Nernst effect as a direct probe of Berry curvature and pairing symmetry in 2D spin-orbit-coupled superconductors. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2509_26638 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Intrinsic Nernst Effect from Berry Curvature in Superconductors Hsieh, Tzu-Chi Xiao, Cong Hsu, Yi-Ting Superconductivity Mesoscale and Nanoscale Physics The Nernst effect in superconductors is typically linked to fluctuating Cooper pairs above $T_c$ or vortex motion below $T_c$. We show instead that Berry curvature of Bogoliubov quasiparticles can generate an intrinsic Nernst response in a clean, vortex-free superconducting state. Focusing on two-dimensional (2D) systems with Ising spin-orbit coupling, relevant to transition-metal dichalcogenides, we identify two regimes: an intervalley $s$-wave paired state where a weak magnetic field activates the effect, and an intravalley chiral $p$-wave paired state that exhibits a spontaneous charge or spin Nernst response without a field. We propose an experimental setup that circumvents screening and provide estimates of the signal magnitude. Our results establish the Nernst effect as a direct probe of Berry curvature and pairing symmetry in 2D spin-orbit-coupled superconductors. |
| title | Intrinsic Nernst Effect from Berry Curvature in Superconductors |
| topic | Superconductivity Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2509.26638 |