Microwave photoassisted dissipation and supercurrent of a phase-biased graphene-superconductor ring
Irradiating normal-superconducting junctions with microwave photons produce spectacular effects, such as Shapiro steps and photoinduced modifications of the dc supercurrent. Moreover, microwave irradiation can also have other, hitherto unexplored consequences, such as a photoassisted dissipation whi...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2021-07-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.3.L032009 |
| _version_ | 1797210986410672128 |
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| author | Ziwei Dou Taro Wakamura Pauli Virtanen Nian-Jheng Wu Richard Deblock Sandrine Autier-Laurent Kenji Watanabe Takashi Taniguchi Sophie Guéron Hélène Bouchiat Meydi Ferrier |
| author_facet | Ziwei Dou Taro Wakamura Pauli Virtanen Nian-Jheng Wu Richard Deblock Sandrine Autier-Laurent Kenji Watanabe Takashi Taniguchi Sophie Guéron Hélène Bouchiat Meydi Ferrier |
| author_sort | Ziwei Dou |
| collection | DOAJ |
| description | Irradiating normal-superconducting junctions with microwave photons produce spectacular effects, such as Shapiro steps and photoinduced modifications of the dc supercurrent. Moreover, microwave irradiation can also have other, hitherto unexplored consequences, such as a photoassisted dissipation which is phase dependent. Here we present a finite-frequency measurement of both the dissipation and the supercurrent of a phase-biased graphene-superconductor junction in response to microwave photons. We find that, while the supercurrent response is well described by existing theory, the dissipation exhibits unexpected effects which need new theoretical elucidation. Especially with high frequency photons, the dissipation is enhanced at phase zero, where it is minimum without irradiation. We attribute this enhancement to Andreev level transitions, made possible by microwave-induced nonequilibrium population of Andreev bound states. Our results demonstrate that dissipation is a more sensitive probe of microwave photons than is the supercurrent, and reveal the potential of measuring dissipation to improve superconducting photodetectors and investigate photoassisted physics in hybrid superconducting systems. |
| first_indexed | 2024-04-24T10:19:18Z |
| format | Article |
| id | doaj.art-50cdd123d8124c739b2b117002890885 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:19:18Z |
| publishDate | 2021-07-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-50cdd123d8124c739b2b1170028908852024-04-12T17:11:37ZengAmerican Physical SocietyPhysical Review Research2643-15642021-07-0133L03200910.1103/PhysRevResearch.3.L032009Microwave photoassisted dissipation and supercurrent of a phase-biased graphene-superconductor ringZiwei DouTaro WakamuraPauli VirtanenNian-Jheng WuRichard DeblockSandrine Autier-LaurentKenji WatanabeTakashi TaniguchiSophie GuéronHélène BouchiatMeydi FerrierIrradiating normal-superconducting junctions with microwave photons produce spectacular effects, such as Shapiro steps and photoinduced modifications of the dc supercurrent. Moreover, microwave irradiation can also have other, hitherto unexplored consequences, such as a photoassisted dissipation which is phase dependent. Here we present a finite-frequency measurement of both the dissipation and the supercurrent of a phase-biased graphene-superconductor junction in response to microwave photons. We find that, while the supercurrent response is well described by existing theory, the dissipation exhibits unexpected effects which need new theoretical elucidation. Especially with high frequency photons, the dissipation is enhanced at phase zero, where it is minimum without irradiation. We attribute this enhancement to Andreev level transitions, made possible by microwave-induced nonequilibrium population of Andreev bound states. Our results demonstrate that dissipation is a more sensitive probe of microwave photons than is the supercurrent, and reveal the potential of measuring dissipation to improve superconducting photodetectors and investigate photoassisted physics in hybrid superconducting systems.http://doi.org/10.1103/PhysRevResearch.3.L032009 |
| spellingShingle | Ziwei Dou Taro Wakamura Pauli Virtanen Nian-Jheng Wu Richard Deblock Sandrine Autier-Laurent Kenji Watanabe Takashi Taniguchi Sophie Guéron Hélène Bouchiat Meydi Ferrier Microwave photoassisted dissipation and supercurrent of a phase-biased graphene-superconductor ring Physical Review Research |
| title | Microwave photoassisted dissipation and supercurrent of a phase-biased graphene-superconductor ring |
| title_full | Microwave photoassisted dissipation and supercurrent of a phase-biased graphene-superconductor ring |
| title_fullStr | Microwave photoassisted dissipation and supercurrent of a phase-biased graphene-superconductor ring |
| title_full_unstemmed | Microwave photoassisted dissipation and supercurrent of a phase-biased graphene-superconductor ring |
| title_short | Microwave photoassisted dissipation and supercurrent of a phase-biased graphene-superconductor ring |
| title_sort | microwave photoassisted dissipation and supercurrent of a phase biased graphene superconductor ring |
| url | http://doi.org/10.1103/PhysRevResearch.3.L032009 |
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