Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2412.19894 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866910765092438016 |
|---|---|
| author | Dong, Zhiyu Levitov, Leonid Lee, Patrick A. |
| author_facet | Dong, Zhiyu Levitov, Leonid Lee, Patrick A. |
| contents | Systems in which exchange interactions couple carrier spins to a spin texture with a net chirality exhibit a spin-dependent Aharonov-Bohm effect, where the geometric gauge field and pseudo-magnetic field have opposite signs for carriers with opposite spins. As a result, Cooper pairs see a net zero vector potential and superconducting pairing is not hindered by pair-breaking effects. This allows superconductivity to occur even when the geometric field induces quantized Landau levels. We identify the dominant pairing order as an s-wave pair density wave of an FFLO type. Flat Landau levels can significantly enhance superconducting $T_c$, favoring superconductivity over competing orders. This exotic paired state features tell-tale signatures such as flat bands of Bogoliubov-deGennes quasiparticles, manifest through Landau level-like resonances in the quasiparticle density of states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_19894 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Chirality-induced pseudo-magnetic fields, flat bands and enhancement of superconductivity Dong, Zhiyu Levitov, Leonid Lee, Patrick A. Superconductivity Systems in which exchange interactions couple carrier spins to a spin texture with a net chirality exhibit a spin-dependent Aharonov-Bohm effect, where the geometric gauge field and pseudo-magnetic field have opposite signs for carriers with opposite spins. As a result, Cooper pairs see a net zero vector potential and superconducting pairing is not hindered by pair-breaking effects. This allows superconductivity to occur even when the geometric field induces quantized Landau levels. We identify the dominant pairing order as an s-wave pair density wave of an FFLO type. Flat Landau levels can significantly enhance superconducting $T_c$, favoring superconductivity over competing orders. This exotic paired state features tell-tale signatures such as flat bands of Bogoliubov-deGennes quasiparticles, manifest through Landau level-like resonances in the quasiparticle density of states. |
| title | Chirality-induced pseudo-magnetic fields, flat bands and enhancement of superconductivity |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2412.19894 |