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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
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
James Jun He et al.
Summary: Nonreciprocal responses in noncentrosymmetric systems are an important fundamental issue, especially non-dissipative and coherent nonreciprocal transport. Recent research on superconductor diodes has advanced this field significantly. This study provides theoretical descriptions and design principles of superconductor diodes, including analytical relations between nonreciprocal critical currents and system parameters in Rashba spin-orbit coupled systems, as well as numerical calculations.
NEW JOURNAL OF PHYSICS
(2022)
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
Multidisciplinary Sciences
E. Strambini et al.
Summary: Diodes are important elements in electronics and optics, and their evolution towards low dissipation electronics has led to the development of supercurrent diodes with zero resistance in one direction. In this study, researchers demonstrate a superconducting tunnel diode with zero conductance in one direction by utilizing a thin ferromagnetic insulator. This cryogenic spintronic rectifier shows promise in highly-sensitive radiation detection and future low-dissipation and fast superconducting electronics.
NATURE COMMUNICATIONS
(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
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
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
Materials Science, Multidisciplinary
Klaus Halterman et al.
Summary: We study trilayer Josephson junctions with arbitrary magnetizations in two dimensions and examine the spatial distribution and phase dependence of charge supercurrents, spin supercurrents, spin torques, and density of states. We find that under certain magnetization conditions, self-biased current enhancement and supercurrent diode effects can be achieved.
Article
Nanoscience & Nanotechnology
Isha Verma et al.
Summary: The study optimized the morphology of free-standing 2D InSb nanoflags (NFs), increasing their lateral size while maintaining defect-free zinc blend crystal structure, stoichiometric composition, and relaxed lattice parameters. These NFs were found large enough to fabricate Hall-bar contacts for precise electrical characterization, resulting in a measured electron mobility of approximately 29,500 cm(2) /(V s), the highest reported for free-standing 2D InSb nanostructures in literature. The study envisions the use of 2D InSb NFs for the fabrication of advanced quantum devices.
ACS APPLIED NANO MATERIALS
(2021)
Article
Physics, Applied
Sedighe Salimian et al.
Summary: High-quality InSb nanoflags, as a versatile III-V semiconductor material, show great potential in advanced quantum technologies, especially in realizing topological superconducting states. Fabrication of ballistic Josephson-junction devices based on InSb nanoflags allows for tunable proximity-induced supercurrent, indicating a promising platform for future quantum applications.
APPLIED PHYSICS LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Yuanjie Chen et al.
Summary: A dual-gate InSb nanosheet field-effect device is used to investigate the controllability of spin-orbit interaction in InSb nanosheet, demonstrating efficient tuning of the interaction. The presence of intrinsic spin-orbit interaction in InSb nanosheet is identified at zero dual-gate voltage, with its physical origin attributed to built-in asymmetry in the device layer structure.
NPJ 2D MATERIALS AND APPLICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Christian M. Moehle et al.
Summary: Experimental results show that topological superconductivity can be engineered in semiconductors with strong spin-orbit interaction by coupling them to a superconductor. The 2D platform based on a ternary 2DEG (InSbAs) coupled to in situ grown aluminum allows for the tuning of spin-orbit coupling and the demonstration of phase-controllable Josephson junctions and superconducting islands. The clean superconductor-semiconductor interface in this system leads to a hard induced superconducting gap, providing a promising platform for studying Majorana zero modes.
Article
Physics, Multidisciplinary
Yuanjie Chen et al.
Summary: The study focuses on the transport properties of a double quantum dot device fabricated from a freestanding InSb nanosheet. Through experimental measurements and numerical simulations, the researchers demonstrate the controllability of single quantum dots and double quantum dots in the InSb nanosheet. The findings suggest that the two-dimensional InSb nanosheet-based double quantum dot has advantages in lateral scaling and could be a promising building block for quantum computation and simulation technologies.
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
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
Zijin Lei et al.
Summary: In this study, we investigated an electrostatically defined quantum point contact (QPC) in a high-mobility InSb two-dimensional electron gas. Well-defined conductance plateaus were observed, and the subband structure of the QPC was extracted from finite-bias measurements. Zeeman splitting was measured in both in-plane and out-of-plane magnetic fields, revealing g factor values close to those in the bulk material.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Isha Verma et al.
Article
Nanoscience & Nanotechnology
Elia Strambini et al.
NATURE NANOTECHNOLOGY
(2020)
Article
Multidisciplinary Sciences
Fuyuki Ando et al.
Article
Multidisciplinary Sciences
Kenji Yasuda et al.
NATURE COMMUNICATIONS
(2019)
Article
Chemistry, Multidisciplinary
Federico Paolucci et al.
Article
Multidisciplinary Sciences
Chung Ting Ke et al.
NATURE COMMUNICATIONS
(2019)
Article
Physics, Condensed Matter
Jinhua Zhi et al.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2019)
Article
Chemistry, Multidisciplinary
Sasa Gazibegovic et al.
ADVANCED MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Jinhua Zhi et al.
Article
Physics, Multidisciplinary
Folkert K. de Vries et al.
PHYSICAL REVIEW RESEARCH
(2019)
Review
Multidisciplinary Sciences
Yoshinori Tokura et al.
NATURE COMMUNICATIONS
(2018)
Article
Materials Science, Multidisciplinary
Shintaro Hoshino et al.
Article
Physics, Multidisciplinary
Sean Hart et al.
Article
Multidisciplinary Sciences
F. Qin et al.
NATURE COMMUNICATIONS
(2017)
Article
Multidisciplinary Sciences
Ryohei Wakatsuki et al.
Article
Chemistry, Multidisciplinary
Maria de la Mata et al.
Article
Chemistry, Multidisciplinary
D. Pan et al.
Article
Chemistry, Multidisciplinary
Fanming Qu et al.
Article
Materials Science, Multidisciplinary
Asbjorn Rasmussen et al.
Article
Materials Science, Multidisciplinary
Fabrizio Dolcini et al.
Article
Materials Science, Multidisciplinary
K. L. Litvinenko et al.
Article
Physics, Multidisciplinary
Jiangping Hu et al.
PHYSICAL REVIEW LETTERS
(2007)
Review
Physics, Applied
I Vurgaftman et al.
JOURNAL OF APPLIED PHYSICS
(2001)
