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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.04188 |
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| _version_ | 1866915430671581184 |
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| author | Fu, Jun-Jie An, Jin |
| author_facet | Fu, Jun-Jie An, Jin |
| contents | Time-reversal invariant $p$-wave superconductors (SCs) are characterized by their $\boldsymbol{d}$-vectors, whose orientations could be manipulated by a tiny magnetic field. We study in this paper the adiabatic pumping process induced by periodically rotating $\boldsymbol{d}$-vector in a topological $p$-wave SC, which is coupled to two normal leads. If $\boldsymbol{d}$-vector rotates nearly within a plane, the pumped spin $2S_z/\hbar$ over one cycle is nearly quantized at $2$ without net charge pumping. When the pumping lead is fully spin-polarized, both the pumped charge $Q/e$ and spin $2S_z/\hbar$ would peak nearly at $1$. When a mixing $s$-wave pairing component is taken into account, a topological phase transition can be driven by modulating the ratio between the pairing components. We found a sharp resonance phenomenon near the phase transition when the $p$-wave $\boldsymbol{d}$-vector is adiabatically rotating, which may help experimentally distinguish the topological SCs from trivial ones. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_04188 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | $\boldsymbol{d}$-vector precession induced pumping in topological $p$-wave superconductors Fu, Jun-Jie An, Jin Superconductivity Time-reversal invariant $p$-wave superconductors (SCs) are characterized by their $\boldsymbol{d}$-vectors, whose orientations could be manipulated by a tiny magnetic field. We study in this paper the adiabatic pumping process induced by periodically rotating $\boldsymbol{d}$-vector in a topological $p$-wave SC, which is coupled to two normal leads. If $\boldsymbol{d}$-vector rotates nearly within a plane, the pumped spin $2S_z/\hbar$ over one cycle is nearly quantized at $2$ without net charge pumping. When the pumping lead is fully spin-polarized, both the pumped charge $Q/e$ and spin $2S_z/\hbar$ would peak nearly at $1$. When a mixing $s$-wave pairing component is taken into account, a topological phase transition can be driven by modulating the ratio between the pairing components. We found a sharp resonance phenomenon near the phase transition when the $p$-wave $\boldsymbol{d}$-vector is adiabatically rotating, which may help experimentally distinguish the topological SCs from trivial ones. |
| title | $\boldsymbol{d}$-vector precession induced pumping in topological $p$-wave superconductors |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2508.04188 |