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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
Physics, Multidisciplinary
Akito Daido et al.
Summary: Based on recent experiments, this study proposes an intrinsic mechanism for the superconducting diode effect and investigates the relationship between the asymmetry of the depairing current and temperature/magnetic field, revealing the rich phase diagram and functionalities of noncentrosymmetric superconductors.
PHYSICAL REVIEW LETTERS
(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
S. Ilic et al.
Summary: In this study, we calculate the nonreciprocal critical current and quantify the supercurrent diode effect in twodimensional Rashba superconductors with arbitrary disorder, using the quasiclassical Eilenberger equation. The results show that even in the presence of strong disorder, the effect persists, and the sign of the diode effect changes as magnetic field and disorder are increased.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Noah F. Q. Yuan et al.
Summary: When both inversion and time-reversal symmetries are broken, the critical current of a superconductor can be nonreciprocal. In this work, it is shown that in certain classes of two-dimensional superconductors with antisymmetric spin-orbit coupling, Cooper pairs acquire a finite momentum upon the application of an in-plane magnetic field, resulting in unequal critical currents in the direction parallel and antiparallel to the Cooper pair momentum. This supercurrent diode effect is also observed in the polarity dependence of in-plane critical fields induced by a supercurrent. These nonreciprocal effects can be found in polar SrTiO3 film, few-layer MoTe2 in the Td phase, and twisted bilayer graphene where the valley degree of freedom plays a role analogous to spin.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Materials Science, Multidisciplinary
Harley D. Scammell et al.
Summary: In this study, the superconducting phase in a heterostructure of mirror-symmetric twisted trilayer graphene and WSe2 was found to exhibit a zero-field superconducting diode effect, which has been investigated and explained with a microscopic theory. The findings not only contribute to the understanding of the physics of trilayer graphene on WSe2, but also provide guidance for future experiments in spin-orbit-coupled graphene moire systems.
Article
Chemistry, Physical
Kun-Rok Jeon et al.
Summary: Researchers have reported a zero-field polarity-switchable Josephson supercurrent diode, in which a proximity-magnetized Pt layer by ferrimagnetic insulating Y3Fe5O12 serves as the Rashba-type Josephson barrier, achieving high-efficiency zero-field rectification effect. The study demonstrates that exchange spin-splitting and Rashba-type spin-orbit coupling at the Pt/Y3Fe5O12 interface are crucial for the zero-field giant rectification efficiency.
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
Margarita Davydova et al.
Summary: We propose a universal mechanism for the Josephson diode effect in short Josephson junctions, which arises from finite Cooper pair momentum and simultaneous breaking of inversion and time-reversal symmetries. The diode efficiency is up to 40% with an asymmetry between the critical currents in opposite directions of approximately 230%. The mechanism is explained by the Doppler shift of the Andreev bound state energies and the phase-independent asymmetric current from the continuum. We also introduce a simple scheme for achieving finite-momentum pairing without relying on spin-orbit coupling, expanding the platforms for observing supercurrent diode effects.
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
Physics, Multidisciplinary
Bastian Zinkl et al.
Summary: In this study, the presence of nonreciprocal critical currents, known as the superconducting diode effect, in chiral superconductors is analyzed within a generalized Ginzburg-Landau framework. After deriving the key symmetry conditions, the basic mechanism is illustrated using two examples: the critical current in a thin film and a Josephson junction. The appearance of spontaneous edge currents and the energy bias for the formation of Josephson vortices play a crucial role in splitting the critical currents running in opposite directions. Ultimately, this study interprets the observed superconducting diode effect in the 3-Kelvin phase of Sr2RuO4 as evidence for spontaneously broken time-reversal symmetry in the superconducting phase.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Multidisciplinary Sciences
Yang-Yang Lyu et al.
Summary: A superconducting diode, which is a dissipationless and highly attractive component for electronic circuits with ultralow power consumption, remains a challenge to realize. By introducing an array of nanoscale holes in a conventional superconducting film, breaking spatial inversion symmetry, the authors achieved a superconducting diode.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Kou Misaki et al.
Summary: Heterojunctions often exhibit rectifying effects, but Josephson junctions may show asymmetry leading to nonreciprocal responses.
Article
Materials Science, Multidisciplinary
A. A. Kopasov et al.
Summary: The study reveals the control of the ground-state phase difference between superconducting leads through Josephson transport in semiconducting nanowires, where the phase varies with the increase of spin splitting field and saturates in a certain range, exhibiting a superconducting diode effect.
Article
Physics, Multidisciplinary
Y. J. Hu et al.
PHYSICAL REVIEW LETTERS
(2020)
Article
Multidisciplinary Sciences
Wudi Wang et al.
Article
Multidisciplinary Sciences
Ce Huang et al.
NATIONAL SCIENCE REVIEW
(2020)
Article
Chemistry, Multidisciplinary
Artem Kononov et al.
Article
Multidisciplinary Sciences
Fuyuki Ando et al.
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Materials Science, Multidisciplinary
Vasily S. Stolyarov et al.
COMMUNICATIONS MATERIALS
(2020)
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Physics, Multidisciplinary
Wen-Yu He et al.
PHYSICAL REVIEW RESEARCH
(2020)
Article
Multidisciplinary Sciences
Ce Huang et al.
NATURE COMMUNICATIONS
(2019)
Article
Multidisciplinary Sciences
Alexandre Assouline et al.
NATURE COMMUNICATIONS
(2019)
Article
Multidisciplinary Sciences
Yanan Li et al.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2018)
Article
Materials Science, Multidisciplinary
Chui-Zhen Chen et al.
Article
Materials Science, Multidisciplinary
Shazhou Zhong et al.
Article
Physics, Multidisciplinary
Han-Jin Noh et al.
PHYSICAL REVIEW LETTERS
(2017)
Article
Multidisciplinary Sciences
Z. Guguchia et al.
NATURE COMMUNICATIONS
(2017)
Article
Physics, Applied
X. Luo et al.
APPLIED PHYSICS LETTERS
(2016)
Article
Chemistry, Physical
Lunan Huang et al.
Article
Physics, Multidisciplinary
Ke Deng et al.
Article
Physics, Multidisciplinary
Takahiro Morimoto et al.
PHYSICAL REVIEW LETTERS
(2016)
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Materials Science, Multidisciplinary
Qiong Zhou et al.
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Physics, Multidisciplinary
F. S. Bergeret et al.
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Dong Hoon Keum et al.
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Jiangping Hu et al.
PHYSICAL REVIEW LETTERS
(2007)
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Materials Science, Multidisciplinary
P Dubos et al.
