Microwave Andreev bound state spectroscopy in a semiconductor-based Planar Josephson junction
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866917053872472064 |
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| author | Elfeky, Bassel Heiba Dindial, Krishna Brandão, David S. Pekerten, Barış Lee, Jaewoo Strickland, William M. Strohbeen, Patrick J. Danilenko, Alisa Baker, Lukas Mikalsen, Melissa Schiela, William Liang, Zixuan Issokson, Jacob Levy, Ido Zutic, Igor Shabani, Javad |
| author_facet | Elfeky, Bassel Heiba Dindial, Krishna Brandão, David S. Pekerten, Barış Lee, Jaewoo Strickland, William M. Strohbeen, Patrick J. Danilenko, Alisa Baker, Lukas Mikalsen, Melissa Schiela, William Liang, Zixuan Issokson, Jacob Levy, Ido Zutic, Igor Shabani, Javad |
| contents | By coupling a semiconductor-based planar Josephson junction to a superconducting resonator, we investigate the Andreev bound states in the junction using dispersive readout techniques. Using electrostatic gating to create a narrow constriction in the junction, our measurements unveil a strong coupling interaction between the resonator and the Andreev bound states. This enables the mapping of isolated tunable Andreev bound states, with an observed transparency of up to 99.94\% along with an average induced superconducting gap of $\sim 150 μ$eV. Exploring the gate parameter space further elucidates a non-monotonic evolution of multiple Andreev bound states with varying gate voltage. Complimentary tight-binding calculations of an Al-InAs planar Josephson junction with strong Rashba spin-orbit coupling provide insight into possible mechanisms responsible for such behavior. Our findings highlight the subtleties of the Andreev spectrum of Josephson junctions fabricated on superconductor-semiconductor heterostructures and offering potential applications in probing topological states in these hybrid platforms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_08487 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Microwave Andreev bound state spectroscopy in a semiconductor-based Planar Josephson junction Elfeky, Bassel Heiba Dindial, Krishna Brandão, David S. Pekerten, Barış Lee, Jaewoo Strickland, William M. Strohbeen, Patrick J. Danilenko, Alisa Baker, Lukas Mikalsen, Melissa Schiela, William Liang, Zixuan Issokson, Jacob Levy, Ido Zutic, Igor Shabani, Javad Mesoscale and Nanoscale Physics By coupling a semiconductor-based planar Josephson junction to a superconducting resonator, we investigate the Andreev bound states in the junction using dispersive readout techniques. Using electrostatic gating to create a narrow constriction in the junction, our measurements unveil a strong coupling interaction between the resonator and the Andreev bound states. This enables the mapping of isolated tunable Andreev bound states, with an observed transparency of up to 99.94\% along with an average induced superconducting gap of $\sim 150 μ$eV. Exploring the gate parameter space further elucidates a non-monotonic evolution of multiple Andreev bound states with varying gate voltage. Complimentary tight-binding calculations of an Al-InAs planar Josephson junction with strong Rashba spin-orbit coupling provide insight into possible mechanisms responsible for such behavior. Our findings highlight the subtleties of the Andreev spectrum of Josephson junctions fabricated on superconductor-semiconductor heterostructures and offering potential applications in probing topological states in these hybrid platforms. |
| title | Microwave Andreev bound state spectroscopy in a semiconductor-based Planar Josephson junction |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2408.08487 |