Microwave photoassisted dissipation and supercurrent of a phase-biased graphene-superconductor ring
| Autor: | Kenji Watanabe, S. Guéron, Taro Wakamura, Sandrine Autier-Laurent, Nian-Jheng Wu, Pauli Virtanen, Ziwei Dou, Takashi Taniguchi, Hélène Bouchiat, Meydi Ferrier, R. Deblock |
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| Přispěvatelé: | Laboratoire de Physique des Solides (LPS), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
suprajohtavuus Physics::Optics 02 engineering and technology Ring (chemistry) 01 natural sciences suprajohteet sähkömagneettinen säteily law.invention mikroaallot Resonator law Condensed Matter::Superconductivity Phase (matter) 0103 physical sciences grafeeni 010306 general physics ComputingMilieux_MISCELLANEOUS [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall] Superconductivity fotonit business.industry Graphene Supercurrent Dissipation Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Physics::Classical Physics 021001 nanoscience & nanotechnology Computer Science::Other Optoelectronics 0210 nano-technology business Microwave |
| Zdroj: | Physical Review Research Physical Review Research, American Physical Society, 2021, 3 (3), ⟨10.1103/PhysRevResearch.3.L032009⟩ |
| ISSN: | 2643-1564 |
| Popis: | 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. peerReviewed |
| Databáze: | OpenAIRE |
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