75 citations · 373 across the 16 of their papers we have counts for
16 papers
In-situ tunable superconducting diode: towards field-free operation with infinite nonreciprocity
Razmik A. Hovhannisyan, Taras Golod, Amirreza Lotfian +1
Efficient, scalable, and magnetic-field-free superconducting diodes are essential for future superconducting electronics; yet, despite significant efforts, such practical devices r…
Demonstration of an optical microwave rectification by a superconducting diode with near 100% efficiency
Razmik A. Hovhannisyan, Amirreza Lotfian, Taras Golod +1
Superconducting electronics offer significant advantages in speed and power efficiency for next-generation computing and communication systems. However, their practical deployment…
Cascade switching current detectors based on arrays of Josephson junctions
Roger Cattaneo, Artemii E. Efimov, Kirill I. Shiianov +2
Cascade multiplication is a common technique to enhance the sensitivity of photon detectors. In this study, we demonstrate novel cascade-amplified superconducting detectors utilizi…
Numerical modelling of a vortex-based superconducting memory cell: dynamics and geometrical optimization of a fluxonic quantum dot
Aiste Skog, Razmik A. Hovhannisyan, Vladimir M. Krasnov
The lack of dense random-access memory is one of the main obstacles to the development of digital superconducting computers. It has been suggested that AVRAM cells, based on the st…
Resonant switching current detector based on underdamped Josephson junctions
Vladimir M. Krasnov
Current-biased Josephson junctions can act as detectors of electromagnetic radiation. At optimal conditions, their sensitivity is limited by fluctuations causing stochastic switchi…
Phase-sensitive evidence for the sign-reversal s+- symmetry of the order parameter in an iron-pnictide superconductor using Nb/Ba1-xNaxFe2As2 Josephson junctions
A. A. Kalenyuk, A. Pagliero, E. A. Borodianskyi +2
Josephson current between two superconductors provides a phase sensitive tool for probing their pairing symmetries. Here we fabricate and study experimentally high-quality Josephso…
Low anisotropy of the upper critical field in a strongly anisotropic layered cuprate: Evidence for paramagnetically limited superconductivity
S. O. Katterwe, Th. Jacobs, A. Maljuk +1
We study angular-dependent magnetoresistance in a low layered cuprate BiSrCuO. The low ~ 4 K allows complete suppression of superconductivity b…
Membrane-based nanocalorimeter for high-resolution measurements of low-temperature specific heat
S. Tagliati, V. M. Krasnov, A. Rydh
A differential, membrane-based nanocalorimeter for general specific heat studies of very small samples, ranging from 0.5 mg to sub-μg in mass, is described. The calorimeter operate…
Temperature dependence of geometrical and velocity matching resonances in Bi2Sr2CaCu2O8+x intrinsic Josephson junctions
S. O. Katterwe, V. M. Krasnov
We study temperature dependence of geometrical (Fiske) and velocity-matching (Eck) resonances in the flux flow state of small Bi2Sr2CaCu2O8+x mesa structures. It is shown that the…
Comparative analysis of tunneling magnetoresistance in low- Nb/AlAlOx/Nb and high- BiPbSrCaCuO intrinsic Josephson junctions
V. M. Krasnov, H. Motzkau, T. Golod +3
We perform a detailed comparison of magnetotunneling in conventional low- Nb/AlAlOx/Nb junctions with that in slightly overdoped BiPbSrCaCuO [Bi(Pb…
Anomalous Hall effect in NiPt thin films
T. Golod, A. Rydh, V. M. Krasnov
We study Hall effect in sputtered NixPt1-x thin films with different Ni concentrations. Temperature, magnetic field and angular dependencies are analyzed and the phase diagram of N…
Observation of superluminal geometrical resonances in Bi2Sr2CaCu2O8+x intrinsic Josephson junctions
S. O. Katterwe, A. Rydh, H. Motzkau +2
We study Fiske steps in small Bi2Sr2CaCu2O8+x mesa structures, containing only few stacked intrinsic Josephson junctions. Careful alignment of magnetic field prevents penetration o…
Detection of the phase shift from a single quantized superconducting vortex
Taras Golod, Andreas Rydh, Vladimir M. Krasnov
An Abrikosov vortex in a superconductor carries a flux quantum, Phi_0 = hc/2e, localized at its center, but induces a global 2pi phase rotation in the superconducting condensate. T…
Nonlinear nonequilibrium quasiparticle relaxation in Josephson junctions
V. M. Krasnov
Nonequilibrium electrons in superconductors relax and eventually recombine into Cooper pairs. Relaxation is facilitated by electron-boson interaction and is accompanied by emission…
Stabilization of in-phase fluxon state by geometrical confinement in small Bi-2212 mesa structures
S. O. Katterwe, V. M. Krasnov
The in-phase (rectangular) fluxon lattice is required for achieving coherent THz emission from stacked Josephson junctions. Unfortunately, it is usually unstable due to mutual repu…
Quantum cascade phenomenon in natural atomic superlattices formed in Bi2Sr2CaCu2O8 single crystals
V. M. Krasnov
Natural atomic superlattices are formed in certain strongly anisotropic layered compound. Here we study interlayer transport in single crystals of Bi2Sr2CaCu2O8 cuprates, which rep…