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Josephson junctions (JJ) are essential for superconducting quantum technologies and searches of self-conjugate quasiparticles, pivotal for fault-tolerant quantum computing. Measuring the current-phase relation (CPR) in JJ based on…

We used the asymmetric superconducting quantum interference device (SQUID) technique to extract the current phase relation (CPR) of a Josephson junction with a 3D-topological insulator (TI) Bi2Se3 nanobelt as the barrier. The obtained CPR…

The current-phase relation (CPR) of a Josephson junction reveals valuable information about the microscopic processes and symmetries that influence the supercurrent. In this Letter, we present direct measurements of the CPR for Josephson…

Superconductivity · Physics 2010-10-08 C. Chialvo , I. C. Moraru , D. J. Van Harlingen , N. Mason

The current-phase relation (CPR) of a Josephson junction (JJ) determines how the supercurrent evolves with the superconducting phase difference across the junction. Knowledge of the CPR is essential in order to understand the response of a…

Three-dimensional topological insulators (TI's) in proximity with superconductors are expected to exhibit exotic phenomena such as topological superconductivity (TSC) and Majorana bound states (MBS), which may have applications in…

Gate-tunable semiconductor nanowires with superconducting leads have great potential for quantum computation and as model systems for mesoscopic Josephson junctions. The supercurrent, $I$, versus the phase, $\phi$, across the junction is…

Mesoscale and Nanoscale Physics · Physics 2025-01-08 Eric M. Spanton , Mingtang Deng , Saulius Vaitiekėnas , Peter Krogstrup , Jesper Nygård , Charles M. Marcus , Kathryn A. Moler

Josephson junctions (JJs) with non-sinusoidal current-phase relations (CPRs) have gathered increasing attention, partly due to growing interest in topological 2D materials. Understanding how CPR and inhomogeneities in JJs influence their…

Superconductivity · Physics 2025-04-08 R. A. Hovhannisyan

We present measurements of the current-phase relation (CPR) of Superconductor-Ferromagnet-Superconductor (SFS) Josephson junctions as a function of temperature. The CPR is determined by incorporating the junction into a superconducting loop…

Superconductivity · Physics 2007-05-23 S. M. Frolov , D. J. Van Harlingen , V. A. Oboznov , V. V. Bolginov , V. V. Ryazanov

We use Superconducting QUantum Interference Device (SQUID) microscopy to characterize the current-phase relation (CPR) of Josephson Junctions from 3-dimentional topological insulator HgTe (3D-HgTe). We find clear skewness in the CPRs of…

We study nanodevices based on ultrathin superconducting nanowires connected in parallel to form nanowire SQUIDs. The function of the critical current versus magnetic field, $I_{C}(B)$, is multivalued, asymmetric and its maxima and minima…

Superconductivity · Physics 2017-09-20 Andrew Murphy , Alexey Bezryadin

We investigate the Josephson diode effect in an asymmetric SQUID consisting of a sinusoidal Josephson junction formed by a Bi$_2$Te$_2$Se flake and a superconducting Nb nanobridge with a linear and multivalued current-phase relation (CPR).…

The current-phase relation (CPR) for asymmetric 45 degree Josephson junctions between two d-wave superconductors has been predicted to exhibit an anomalous periodicity. We have used the single-junction interferometer to investigate the CPR…

The nano-bridge junction (NBJ) is a type of Josephson junction that is advantageous for the miniaturization of superconducting circuits. However, the current-phase relation (CPR) of the NBJ usually deviates from a sinusoidal function which…

Mesoscale and Nanoscale Physics · Physics 2023-08-03 Yue Wang , Lei Chen , Yinping Pan , Denghui Zhang , Shujie Yu , Guangting Wu , Xiaoyu Liu , Ling Wu , Weifeng Shi , Guofeng Zhang , Lu Zhang , Wei Peng , Jie Ren , Zhen Wang

We propose a scheme to measure both the current-phase relation and differential conductance $dI/dV$ of a superconducting junction, in the normal and the superconducting states. This is done using a dc Superconducting Quantum Interference…

Mesoscale and Nanoscale Physics · Physics 2014-07-21 J. Basset , R. Delagrange , R. Weil , A. Kasumov , H. Bouchiat , R. Deblock

Conventional treatments of Josephson junctions (JJs) are typically not current-conserving. In the mean-field BCS theory, current conservation is only guaranteed if the superconducting order parameter is treated self-consistently. We show…

Superconductivity · Physics 2025-10-14 Simon Krekels , Vukan Levajac , Kristof Moors , George Simion , Bart Sorée

We present the results of theoretical study of Current-Phase Relations (CPR) in Josephson junctions of SIsFS type, where 'S' is a bulk superconductor and 'IsF' is a complex weak link consisting of a superconducting film 's', a metallic…

Superconductivity · Physics 2015-06-17 S. V. Bakurskiy , N. V. Klenov , I. I. Soloviev , M. Yu. Kupriyanov , A. A. Golubov

We study the current-phase relation (CPR) of an InSb-Al nanowire Josephson junction in parallel magnetic fields up to $700$\,mT. At high magnetic fields and in narrow voltage intervals of a gate under the junction, the CPR exhibits…

Mesoscale and Nanoscale Physics · Physics 2023-10-06 Vukan Levajac , Hristo Barakov , Grzegorz P. Mazur , Nick van Loo , Leo P. Kouwenhoven , Yuli V. Nazarov , Ji-Yin Wang

Superconductor/normal conductor/superconductor (SNS) Josephson junctions with highly transparent interfaces are predicted to show significant deviations from sinusoidal supercurrent-phase relationships (CPR) at low temperatures. We…

Superconductivity · Physics 2009-11-10 M. Ebel , C. Busch , U. Merkt , M. Grajcar , T. Plecenik , E. Il'ichev

We present direct measurements of the current-phase relation for lateral Josephson junctions with a graphene barrier, obtained by a phase-sensitive SQUID interferometry technique. We find that the current-phase relation is forward skewed…

Mesoscale and Nanoscale Physics · Physics 2016-09-01 Christopher English , David Hamilton , Cesar Chialvo , Ion Moraru , Nadya Mason , Dale Van Harlingen

Hybrid superconductor(S)-semiconductor(Sm) devices bring a range of new functionalities into superconducting circuits. In particular, hybrid parity-protected qubits and Josephson diodes were recently proposed and experimentally…

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