Josephson detection of time-reversal symmetry broken superconductivity in SnTe nanowires

Abstract A Josephson junction (JJ) couples the supercurrent flowing between two weakly linked superconductors to the phase difference between them via a current-phase relation (CPR). While a sinusoidal CPR is expected for conventional junctions with insulating weak links, devices made from some exot...

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Autores principales:	C. J. Trimble, M. T. Wei, N. F. Q. Yuan, S. S. Kalantre, P. Liu, H.-J. Han, M.-G. Han, Y. Zhu, J. J. Cha, L. Fu, J. R. Williams
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
Acceso en línea:	https://doaj.org/article/c1706cda14f0441bb7c2a78e078607a1
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spelling	oai:doaj.org-article:c1706cda14f0441bb7c2a78e078607a12021-12-02T16:04:26ZJosephson detection of time-reversal symmetry broken superconductivity in SnTe nanowires10.1038/s41535-021-00359-w2397-4648https://doaj.org/article/c1706cda14f0441bb7c2a78e078607a12021-06-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00359-whttps://doaj.org/toc/2397-4648Abstract A Josephson junction (JJ) couples the supercurrent flowing between two weakly linked superconductors to the phase difference between them via a current-phase relation (CPR). While a sinusoidal CPR is expected for conventional junctions with insulating weak links, devices made from some exotic materials may give rise to unconventional CPRs and unusual Josephson effects. In this work, we present such a case: we investigate the proximity-induced superconductivity in SnTe nanowires by incorporating them as weak links in JJs and observe a deviation from the standard CPR. We report on indications of an unexpected breaking of time-reversal symmetry in these devices, detailing the unconventional characteristics that reveal this behavior. These include an asymmetric critical current in the DC Josephson effect, a prominent second harmonic in the AC Josephson effect, and a magnetic diffraction pattern with a minimum in critical current at zero magnetic field. The analysis examines how multiband effects and the experimentally visualized ferroelectric domain walls give rise to this behavior, giving insight into the Josephson effect in materials that possess ferroelectricity and/or multiband superconductivity.C. J. TrimbleM. T. WeiN. F. Q. YuanS. S. KalantreP. LiuH.-J. HanM.-G. HanY. ZhuJ. J. ChaL. FuJ. R. WilliamsNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 C. J. Trimble M. T. Wei N. F. Q. Yuan S. S. Kalantre P. Liu H.-J. Han M.-G. Han Y. Zhu J. J. Cha L. Fu J. R. Williams Josephson detection of time-reversal symmetry broken superconductivity in SnTe nanowires
description	Abstract A Josephson junction (JJ) couples the supercurrent flowing between two weakly linked superconductors to the phase difference between them via a current-phase relation (CPR). While a sinusoidal CPR is expected for conventional junctions with insulating weak links, devices made from some exotic materials may give rise to unconventional CPRs and unusual Josephson effects. In this work, we present such a case: we investigate the proximity-induced superconductivity in SnTe nanowires by incorporating them as weak links in JJs and observe a deviation from the standard CPR. We report on indications of an unexpected breaking of time-reversal symmetry in these devices, detailing the unconventional characteristics that reveal this behavior. These include an asymmetric critical current in the DC Josephson effect, a prominent second harmonic in the AC Josephson effect, and a magnetic diffraction pattern with a minimum in critical current at zero magnetic field. The analysis examines how multiband effects and the experimentally visualized ferroelectric domain walls give rise to this behavior, giving insight into the Josephson effect in materials that possess ferroelectricity and/or multiband superconductivity.
format	article
author	C. J. Trimble M. T. Wei N. F. Q. Yuan S. S. Kalantre P. Liu H.-J. Han M.-G. Han Y. Zhu J. J. Cha L. Fu J. R. Williams
author_facet	C. J. Trimble M. T. Wei N. F. Q. Yuan S. S. Kalantre P. Liu H.-J. Han M.-G. Han Y. Zhu J. J. Cha L. Fu J. R. Williams
author_sort	C. J. Trimble
title	Josephson detection of time-reversal symmetry broken superconductivity in SnTe nanowires
title_short	Josephson detection of time-reversal symmetry broken superconductivity in SnTe nanowires
title_full	Josephson detection of time-reversal symmetry broken superconductivity in SnTe nanowires
title_fullStr	Josephson detection of time-reversal symmetry broken superconductivity in SnTe nanowires
title_full_unstemmed	Josephson detection of time-reversal symmetry broken superconductivity in SnTe nanowires
title_sort	josephson detection of time-reversal symmetry broken superconductivity in snte nanowires
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c1706cda14f0441bb7c2a78e078607a1
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Josephson detection of time-reversal symmetry broken superconductivity in SnTe nanowires

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