Determination of the current-phase relation of an InAs 2DEG Josephson junction with a microwave resonator
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arXiv
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| Autores principales: | , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866911094029680640 |
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| author | Scherübl, Zoltán Sütő, Máté Kóti, Dávid Tóvári, Endre Horváth, Csaba Kalmár, Tamás Vasas, Bence Berke, Martin Kirti, Magdhi Biasiol, Giorgio Csonka, Szabolcs Makk, Péter Fülöp, Gergő |
| author_facet | Scherübl, Zoltán Sütő, Máté Kóti, Dávid Tóvári, Endre Horváth, Csaba Kalmár, Tamás Vasas, Bence Berke, Martin Kirti, Magdhi Biasiol, Giorgio Csonka, Szabolcs Makk, Péter Fülöp, Gergő |
| contents | Semiconductor-superconductor hybrid nanocircuits are of high interest due to their potential applications in quantum computing. Semiconductors with a strong spin-orbit coupling and large $g$-factor are particularly attractive since they are the basic building blocks of novel qubit architectures. However, for the engineering of these complex circuits, the building blocks must be characterized in detail. We have investigated a Josephson junction where the weak link is a two-dimensional electron gas (2DEG) hosted in an InAs/InGaAs heterostructure grown on a GaAs substrate. We employed the in-situ epitaxially grown Al layer as superconducting contacts to form an rf SQUID, and also to create a microwave resonator for sensing the Josephson inductance. We determined the gate-dependent current-phase relation, and observed supercurrent interference in out-of-plane magnetic fields. With the application of an in-plane magnetic field, we induced asymmetry in the interference pattern, which was found to be anisotropic in the device plane. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_20059 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Determination of the current-phase relation of an InAs 2DEG Josephson junction with a microwave resonator Scherübl, Zoltán Sütő, Máté Kóti, Dávid Tóvári, Endre Horváth, Csaba Kalmár, Tamás Vasas, Bence Berke, Martin Kirti, Magdhi Biasiol, Giorgio Csonka, Szabolcs Makk, Péter Fülöp, Gergő Mesoscale and Nanoscale Physics Semiconductor-superconductor hybrid nanocircuits are of high interest due to their potential applications in quantum computing. Semiconductors with a strong spin-orbit coupling and large $g$-factor are particularly attractive since they are the basic building blocks of novel qubit architectures. However, for the engineering of these complex circuits, the building blocks must be characterized in detail. We have investigated a Josephson junction where the weak link is a two-dimensional electron gas (2DEG) hosted in an InAs/InGaAs heterostructure grown on a GaAs substrate. We employed the in-situ epitaxially grown Al layer as superconducting contacts to form an rf SQUID, and also to create a microwave resonator for sensing the Josephson inductance. We determined the gate-dependent current-phase relation, and observed supercurrent interference in out-of-plane magnetic fields. With the application of an in-plane magnetic field, we induced asymmetry in the interference pattern, which was found to be anisotropic in the device plane. |
| title | Determination of the current-phase relation of an InAs 2DEG Josephson junction with a microwave resonator |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2406.20059 |