Josephson $\varphi_{0}$-junction in nanowire quantum dots
| Autor: | Sebastien Plissard, Stevan Nadj-Perge, Epam Erik Bakkers, Leo P. Kouwenhoven, Daniel Szombati, Diana Car |
|---|---|
| Přispěvatelé: | Delft University of Technology (TU Delft), Eindhoven University of Technology [Eindhoven] (TU/e), Équipe Matériaux et Procédés pour la Nanoélectronique (LAAS-MPN), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Photonics and Semiconductor Nanophysics, Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Physics
Superconductivity Josephson effect Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Supercurrent Nanowire General Physics and Astronomy 02 engineering and technology [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences Pi Josephson junction [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph] Quantum mechanics Condensed Matter::Superconductivity 0103 physical sciences [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] [CHIM.CRIS]Chemical Sciences/Cristallography Superconducting tunnel junction 010306 general physics 0210 nano-technology Superconducting quantum computing Quantum tunnelling |
| Zdroj: | Nature Physics Nature Physics, Nature Publishing Group, 2016, 12 (6), pp.568-572. ⟨10.1038/nphys3742⟩ Nature Physics, 12(6), 568-572. Nature Publishing Group Nature Physics, 2016, 12 (6), pp.568-572. ⟨10.1038/nphys3742⟩ |
| ISSN: | 1745-2473 1476-4636 |
| Popis: | The Josephson effect describes supercurrent flowing through a junction connecting two superconducting leads by a thin barrier [1]. This current is driven by a superconducting phase difference $\phi$ between the leads. In the presence of chiral and time reversal symmetry of the Cooper pair tunneling process [2] the current is strictly zero when $\phi$ vanishes. Only if these underlying symmetries are broken the supercurrent for $\phi=0$ may be finite [3-5]. This corresponds to a ground state of the junction being offset by a phase $\phi_{0}$, different from 0 or $\pi$. Here, we report such a Josephson $\phi_{0}$-junction based on a nanowire quantum dot. We use a quantum interferometer device in order to investigate phase offsets and demonstrate that $\phi_{0}$ can be controlled by electrostatic gating. Our results have possible far reaching implications for superconducting flux and phase defined quantum bits as well as for exploring topological superconductivity in quantum dot systems. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink