Superconducting Diode Effect Sign Change in Epitaxial Al-InAs Josepshon Junctions
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866916196800004096 |
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| author | Lotfizadeh, Neda Schiela, William F. Pekerten, Barış Yu, Peng Elfeky, Bassel Heiba Strickland, William Matos-Abiague, Alex Shabani, Javad |
| author_facet | Lotfizadeh, Neda Schiela, William F. Pekerten, Barış Yu, Peng Elfeky, Bassel Heiba Strickland, William Matos-Abiague, Alex Shabani, Javad |
| contents | There has recently been a surge of interest in studying the superconducting diode effect (SDE) partly due to the possibility of uncovering the intrinsic properties of a material system. A change of sign of the SDE at finite magnetic field has previously been attributed to different mechanisms. Here, we observe the SDE in epitaxial Al-InAs Josephson junctions with strong Rashba spin-orbit coupling (SOC). We show that this effect strongly depends on the orientation of the in-plane magnetic field. In the presence of a strong magnetic field, we observe a change of sign in the SDE. Simulation and measurement of supercurrent suggest that depending on the superconducting widths, $W_\text{S}$, this sign change may not necessarily be related to 0--$π$ or topological transitions. We find that the strongest sign change in junctions with narrow $W_\text{S}$ is consistent with SOC-induced asymmetry of the critical current under magnetic-field inversion, while in wider $W_\text{S}$, the sign reversal could be related to 0--$π$ transitions and topological superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_01902 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Superconducting Diode Effect Sign Change in Epitaxial Al-InAs Josepshon Junctions Lotfizadeh, Neda Schiela, William F. Pekerten, Barış Yu, Peng Elfeky, Bassel Heiba Strickland, William Matos-Abiague, Alex Shabani, Javad Mesoscale and Nanoscale Physics Superconductivity There has recently been a surge of interest in studying the superconducting diode effect (SDE) partly due to the possibility of uncovering the intrinsic properties of a material system. A change of sign of the SDE at finite magnetic field has previously been attributed to different mechanisms. Here, we observe the SDE in epitaxial Al-InAs Josephson junctions with strong Rashba spin-orbit coupling (SOC). We show that this effect strongly depends on the orientation of the in-plane magnetic field. In the presence of a strong magnetic field, we observe a change of sign in the SDE. Simulation and measurement of supercurrent suggest that depending on the superconducting widths, $W_\text{S}$, this sign change may not necessarily be related to 0--$π$ or topological transitions. We find that the strongest sign change in junctions with narrow $W_\text{S}$ is consistent with SOC-induced asymmetry of the critical current under magnetic-field inversion, while in wider $W_\text{S}$, the sign reversal could be related to 0--$π$ transitions and topological superconductivity. |
| title | Superconducting Diode Effect Sign Change in Epitaxial Al-InAs Josepshon Junctions |
| topic | Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2303.01902 |