Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.08235 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916057319473152 |
|---|---|
| author | Li, Yu-Hang Wu, Congjun Yang, Wang |
| author_facet | Li, Yu-Hang Wu, Congjun Yang, Wang |
| contents | We investigate multicomponent superconductivity in twisted bilayer cuprates with order parameter $s+d_1 e^{iϕ_1}+d_2 e^{iϕ_2}$, where $s=s_1+s_2$ is the symmetric layer-resolved $s$-wave component and $d_i$ denotes the $d$-wave pairing in layer $i$. When $ϕ_1-ϕ_2\neq 0,π$, this three-component state breaks time-reversal and $C_4$ rotational symmetries and is topologically nontrivial. Combining Ginzburg--Landau analysis with self-consistent microscopic mean-field calculations, we show that this topological state is stabilized over a broad parameter regime. We further identify nematic Kerr anisotropy as a smoking-gun signature distinguishing it from $s+id$ and $d_1+e^{iϕ}d_2$ states. Our results show that a sizable $s$-wave component does not preclude chiral topological superconductivity, pointing to twisted cuprates as a more robust platform than previously appreciated. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_08235 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Topological multicomponent superconductivity with sizable $s$-wave admixture in twisted bilayer cuprates Li, Yu-Hang Wu, Congjun Yang, Wang Superconductivity We investigate multicomponent superconductivity in twisted bilayer cuprates with order parameter $s+d_1 e^{iϕ_1}+d_2 e^{iϕ_2}$, where $s=s_1+s_2$ is the symmetric layer-resolved $s$-wave component and $d_i$ denotes the $d$-wave pairing in layer $i$. When $ϕ_1-ϕ_2\neq 0,π$, this three-component state breaks time-reversal and $C_4$ rotational symmetries and is topologically nontrivial. Combining Ginzburg--Landau analysis with self-consistent microscopic mean-field calculations, we show that this topological state is stabilized over a broad parameter regime. We further identify nematic Kerr anisotropy as a smoking-gun signature distinguishing it from $s+id$ and $d_1+e^{iϕ}d_2$ states. Our results show that a sizable $s$-wave component does not preclude chiral topological superconductivity, pointing to twisted cuprates as a more robust platform than previously appreciated. |
| title | Topological multicomponent superconductivity with sizable $s$-wave admixture in twisted bilayer cuprates |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2604.08235 |