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Article
Multidisciplinary Sciences
Mohit Gupta et al.
Summary: The Josephson diode effect is observed in three-terminal Josephson devices based on InAs quantum well electron gas proximitized by an epitaxial aluminum layer. The diode efficiency in these devices can be tuned by a magnetic field or electrostatic gating. It is also found that the diode effect is inherent in multi-terminal Josephson devices, providing a scalable approach for potential applications.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Condensed Matter
C. Baumgartner et al.
Summary: The simultaneous breaking of inversion- and time-reversal symmetry in Josephson junction (JJ) leads to anomalous Josephson effect and magnetochiral anisotropy (MCA) of Josephson inductance. The orientation of the current with respect to the lattice affects the MCA, possibly due to a finite Dresselhaus component, and the two-fold symmetry of the Josephson inductance reflects in the activation energy for phase slips.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Nanoscience & Nanotechnology
Christian Baumgartner et al.
Summary: This study introduces the design and application of non-reciprocal superconducting devices. By fabricating and measuring Josephson junctions, researchers have successfully achieved rectification of supercurrent and proposed a semi-quantitative model to explain the experimental data.
NATURE NANOTECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Heng Wu et al.
Summary: The Josephson diode, which serves as the superconducting analogue to the semiconducting diode, has been realized in a van der Waals heterostructure, showing unique properties such as magnetic-field-free superconductivity and different behaviors under positive and negative currents.
Article
Physics, Multidisciplinary
Jiang-Xiazi Lin et al.
Summary: A superconducting diode effect is observed in twisted trilayer graphene at zero magnetic field, indicating the coexistence of superconductivity and time-reversal symmetry breaking. This non-reciprocal behavior can be controlled by adjusting carrier density, twist angle, or applying a magnetic field.
Article
Physics, Multidisciplinary
Banabir Pal et al.
Summary: This study reports the discovery of a giant Josephson diode effect in Josephson junctions formed from a type-II Dirac semimetal, NiTe2. The distinguishing feature of this effect is the asymmetry in the critical current, which depends on the magnitude and direction of an applied magnetic field and achieves its maximum value when the magnetic field is perpendicular to the current and is of the order of just 10 mT. These characteristic features can be explained by a model based on finite-momentum Cooper pairing that largely originates from the Zeeman shift of spin-helical topological surface states.
Article
Multidisciplinary Sciences
Lorenz Bauriedl et al.
Summary: The supercurrent diode effect has been observed in NbSe2 crystals, where it is proportional to the out-of-plane magnetic field. This effect can be utilized for designing highly integrable superconducting quantum electronic devices.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Bianca Turini et al.
Summary: We report nonreciprocal dissipation-less transport in single ballistic InSb nanoflag Josephson junctions. An inequality in supercurrent for the two opposite current propagation directions is observed by applying an in-plane magnetic field, indicating that these devices can function as Josephson diodes. The supercurrent asymmetry increases linearly with external field for small fields, saturates as the Zeeman energy becomes relevant, and then decreases to zero at higher fields. The effect is maximized when the in-plane field is perpendicular to the current vector, suggesting Rashba spin-orbit coupling as the main symmetry-breaking mechanism.
Article
Nanoscience & Nanotechnology
Loren D. Alegria et al.
Summary: The study of tunnel spectroscopy in mesoscopic superconductors under high electric fields revealed the unexplored phenomenon of high-energy QP injection and its impact on critical current, as well as the observation of the superconductor switching to a normal state under the influence of electric field.
NATURE NANOTECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Tosson Elalaily et al.
Summary: Researchers have achieved gate-controlled supercurrent for the first time on InAs nanowires, where the supercurrent in the epitaxial Al layer can be switched to the normal state by applying a voltage. Despite ruling out the electric field as the origin of GCS in their device through extensive study of temperature and magnetic field dependencies, they find that a recent model based on non-equilibrium phonons is compatible with most of their results.
Article
Multidisciplinary Sciences
M. F. Ritter et al.
Summary: Recent experiments suggest that superconductivity in metallic nanowires can be controlled by applying electric fields, with critical currents being tuned and eventually suppressed by small gate voltages. However, the mechanism behind critical current suppression remains controversial, with some proposing tunneling of high-energy electrons as a key factor. The onset of critical current suppression below 100fA gate currents presents challenges in typical experiments.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
I Golokolenov et al.
Summary: Superconducting quantum devices have a variety of applications and are controlled by Josephson junctions via electric current or magnetic field. Recent reports on the field effect in superconducting devices may revolutionize the field of superconductor electronics, although controversy exists.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
Yuta Miyasaka et al.
Summary: This study demonstrates that nonreciprocal superconducting behavior can be achieved in a [Nb/V/Ta](n) superlattice without a center of inversion under an electric current bias, showing clear differences between positive and negative magnetic fields. Moreover, the magnitude relation between positive and negative critical magnetic fields can be reversed by changing the direction of the electric current, suggesting that the superconducting gap can exhibit anisotropy through the application of electric current.
APPLIED PHYSICS EXPRESS
(2021)
Article
Multidisciplinary Sciences
Nadia Ligato et al.
Summary: The proposed superconducting memory cell utilizes the hysteretic phase-slip transition in long aluminum nanowire Josephson junctions to encode logic states, disentangling it from the large-inductance constraint and providing topological protection against stochastic phase-slips and magnetic-flux noise. This makes it a promising solution for advanced superconducting classical logic architectures or flux qubits.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
J. Basset et al.
Summary: By investigating the influence of a gate electrode on a metallic-insulator-metal Josephson structure, it is found that high-energy electron leakage triggers a reduction in critical current and results in broadening of the switching histograms. The switching rates can be described well by an activation formula that includes an additional term accounting for the injection of rare high-energy electrons from the gate.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Physics, Applied
C. Puglia et al.
APPLIED PHYSICS LETTERS
(2020)
Article
Physics, Applied
G. De Simoni et al.
APPLIED PHYSICS LETTERS
(2020)
Article
Multidisciplinary Sciences
Fuyuki Ando et al.
Article
Physics, Applied
Federico Paolucci et al.
PHYSICAL REVIEW APPLIED
(2019)
Article
Chemistry, Multidisciplinary
Federico Paolucci et al.
Article
Physics, Applied
Alex I. Braginski
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2019)
Article
Chemistry, Multidisciplinary
Federico Paolucci et al.
Article
Nanoscience & Nanotechnology
Giorgio De Simoni et al.
NATURE NANOTECHNOLOGY
(2018)
Article
Physics, Multidisciplinary
Andrew Murphy et al.
NEW JOURNAL OF PHYSICS
(2017)
Article
Chemistry, Multidisciplinary
Adam N. McCaughan et al.
Article
Engineering, Electrical & Electronic
Igor V. Vernik et al.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2013)
Article
Nanoscience & Nanotechnology
P. Spathis et al.
Article
Chemistry, Multidisciplinary
Caglar Girit et al.
Review
Physics, Multidisciplinary
AA Golubov et al.
REVIEWS OF MODERN PHYSICS
(2004)