Article
Physics, Multidisciplinary
Daniel Margineda, Alessandro Crippa, Elia Strambini, Yuri Fukaya, Maria Teresa Mercaldo, Mario Cuoco, Francesco Giazotto
Summary: Researchers have discovered that all-metallic superconducting Dayem nanobridges exhibit nonreciprocal supercurrents under an external magnetic field, with a rectification efficiency of up to approximately 27%. The polarity of the diode can be tuned by varying the amplitude of an out-of-plane magnetic field or the temperature.
COMMUNICATIONS PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
J. F. Zhao, H. P. Wang, B. Wei
Summary: The Nb-rich region of the refractory Nb-Ni alloy phase diagram was investigated using thermal analysis, annealing experiments, and electron probe microanalysis (EPMA). A new stable intermetallic phase Nb2Ni with a stoichiometric composition was identified. The peritectoid transition of (Nb) + Nb7Ni6 to Nb2Ni was observed at a temperature of 1569.7 K. Powder XRD measurements revealed the equilibrium lattice constants of Nb7Ni6, Nb2Ni, and (Nb) phases.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Hodaka Kurokawa, Sota Nakamura, Jiahui Zhao, Naoki Shikama, Yuki Sakishita, Yue Sun, Fuyuki Nabeshima, Yoshinori Imai, Haruhisa Kitano, Atsutaka Maeda
Summary: The study measured the complex conductivity of FeSe1-xTex films in different superconducting states, finding that the disappearance of nematic order significantly increases the superconducting transition temperature Tc, impacting the superconducting gap structure. The proportionality between superfluid density and Tc was observed, with changes in the Fermi surface identified as the primary factor affecting Tc and the superconducting gap structure.
Article
Multidisciplinary Sciences
I Golokolenov, A. Guthrie, S. Kafanov, Yu A. Pashkin, V Tsepelin
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
Materials Science, Multidisciplinary
Daniel Sabsovich, Marc W. Bockrath, Kirill Shtengel, Eran Sela
Summary: The authors investigated Andreev states at the interface of graphene and a superconductor in a uniform pseudomagnetic field, discovering a topological transition with an applied Zeeman field. They found a gapless helical mode that is protected from backscattering as long as intervalley and spin-flip scattering are suppressed. A possible experimental platform based on strained suspended membranes on a superconductor was discussed for detecting this gapless mode through dynamic strain-induced charge pumping.
Article
Physics, Applied
Zhujun Huang, Bassel Heiba Elfeky, Takashi Taniguchi, Kenji Watanabe, Javad Shabani, Davood Shahrjerdi
Summary: We study quantum transport and AC Josephson effect in hexagonal boron nitride encapsulated graphene Josephson junctions. The emergence of half-integer Shapiro steps in the n-type regime with high electron carrier densities is observed. This observation is attributed to the gate-tunable transmission probability of the graphene junction. Numerical simulations support the appearance of half-integer Shapiro steps at high transparency, indicating a skewed current phase relationship in the graphene Josephson junction.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Environmental
Taylor D. Sullivan, Andrew D. Parsekian
Summary: High fidelity observations of water in permafrost are important for understanding soil moisture behavior and its impact on surface energy balance. Temperature-specific calibration of borehole NMR measurements is necessary for accurate results. Failure to compensate for temperature can result in significant bias in reported water content values, especially in conditions with steep temperature gradients.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
M. Yu Levichev, I. Yu Pashenkin, N. S. Gusev, D. Yu Vodolazov
Summary: The study focuses on the voltage controllable superconducting state in a multiterminal bridge, showing the sensitivity of critical current to control current/voltage and the existence of the so-called in-plane Fulde-Ferrell state. The voltage-induced nonequilibrium effects could be interpreted in terms of increased local electron temperature, while the appearance of the in-plane Fulde-Ferrell state is connected with voltage-induced paramagnetic response in the normal layer.
Article
Quantum Science & Technology
Azat F. Aminov, Alexey A. Sokolik, Yurii E. Lozovik
Summary: The Andreev-Bashkin effect, also known as superfluid drag, is predicted in a system of Bose-condensed excitonic polaritons coupled with a superconducting layer in an optical microcavity. The drag density characterizing the magnitude of this effect is found through many-body calculations, taking into account the dynamic screening of electron-exciton interaction. The predicted non-dissipative drag may reach considerable values in realistic conditions.
Article
Optics
Nicholaus Kevin Tanjaya, Keiichiro Toda, Takuro Ideguchi, Satoshi Ishii
Summary: Quantitative phase microscopy (QPM) is used in this study to determine the thermal conductivity and thermo-optic coefficient (TOC) of a transparent substrate. By measuring the phase difference induced by an external heating laser, the thermal conductivity and TOC are simultaneously extracted through modeling based on heat transfer and thermo-optic effect. The method shows potential for measuring thermal conductivities and TOCs of other transparent substrates and has advantages in terms of setup simplicity and modeling ease.
Article
Chemistry, Physical
Marco Bonetti
Summary: This study investigates the influence of intermolecular interactions on the glass properties of 1-alkyl-3-methylimidazolium tetrafluoroborate ionic liquids. It is found that the energy required to increase the volume is well correlated with the glass-transition pressure, suggesting a connection between the energy landscape and ion diffusion.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Yuechen Gao, Yihua Lu, Xi Zhu
Summary: Currently, computational materials science relies on human-computer interaction through coding or neural networks, lacking direct integration of human intelligence. The digitization of human intelligence is considered crucial across various disciplines. In this study, a materials science computation platform called Mateverse is proposed, based on Metaverse, which integrates human intelligence, experimental data, and theoretical simulations. By leveraging this platform, a new water force field (TIP4P-Meta) is optimized directly from the interactions between human and visible properties of H2O, leading to the generation of new ice polymorphs.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Letter
Chemistry, Physical
Abbie Lear, J. L. Ross Anderson, Donald Hilvert, Vickery L. Arcus, Marc W. van der Kamp, H. Adrian Bunzel, Adrian J. Mulholland
Summary: Activation heat capacity is an important factor in enzyme evolution and thermoadaptation. We found that the emergence of curved activity-temperature profiles in a designer enzyme was due to the selective rigidification of its transition state ensemble that induced an activation heat capacity. However, simulations by angstrom qvist challenged our findings, suggesting that the experimental observations were caused by a change in the rate-limiting step.
Article
Materials Science, Multidisciplinary
Tamas Haidekker Galambos, Flavio Ronetti, Bence Hetenyi, Daniel Loss, Jelena Klinovaja
Summary: In this hybrid quantum Hall-superconductor system, nonlocal crossed Andreev reflection can occur due to the distortion effect of the Maxwell equations, resulting in a gap in the spectrum of the edge states. Numerical calculations also reveal the existence of negative resistance and stable zero-energy local density of states, which may be related to the emergence of Majorana bound states.
Article
Chemistry, Physical
Aleksandra Deptuch, Malgorzata Jasiurkowska-Delaporte, Wojciech Zajac, Ewa Juszynska-Galazka, Anna Drzewicz, Magdalena Urbanska
Summary: The study investigated the phase transitions, crystallization kinetics, and molecular dynamics of a specific organic compound, revealing the vitrification of the antiferroelectric hexatic phase, different behaviors of non-isothermal cold crystallization at various heating rates, and the temperature dependence of the crystallization rate. The results suggest a mainly diffusion-controlled cold crystallization process and favor two-dimensional crystal growth rather than three-dimensional growth. The lower activation energy observed during heating indicates a transition between crystal phases at different rates.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Mathematics, Interdisciplinary Applications
A. A. Yablokov, E. Glushkov, A. L. Pankratov, A. Gordeeva, L. S. Kuzmin, E. Il'ichev
Summary: The Josephson junction, when used as a switching detector, shows more efficient detection of weak signals within a certain parameter range. As the signal power decreases, the double minima of mean switching time and standard deviation transform into a single minimum, indicating a balance between noise suppression and resonant activation regimes. The resonant nature of escape allows for detection of weak signals with amplitudes weaker than the difference between the critical current and bias current of the Josephson junction.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Materials Science, Coatings & Films
Emanuel Knehr, Mario Ziegler, Sven Linzen, Konstantin Ilin, Patrick Schanz, Jonathan Plentz, Marco Diegel, Heidemarie Schmidt, Evgeni Il'ichev, Michael Siegel
Summary: The study found that ALD-NbN exhibits property variations across a 6-inch wafer area. Over the equivalent area of a 2-inch wafer, the maximum deviation in critical temperature is 1% and in switching current is 12%. Structural characterizations indicate that changes in crystal structure appear to be the limiting factor for larger areas.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2021)
Article
Nanoscience & Nanotechnology
Xing Gao, Carlos M. M. Rosario, Hans Hilgenkamp
Summary: This study reports on the fabrication of in-plane VO2 metal-insulator-metal structures and reproducible switching measurements in these two-terminal devices. Controllable resistive switching can be achieved by applying voltage or current bias, with a pronounced intermediate state in the reset process and the ability to operate at multiple resistance levels.
Article
Nanoscience & Nanotechnology
Andrey E. Schegolev, Nikolay V. Klenov, Sergey V. Bakurskiy, Igor I. Soloviev, Mikhail Yu. Kupriyanov, Maxim V. Tereshonok, Anatoli S. Sidorenko
Summary: The paper explores the hardware implementation of signal microprocessors based on superconducting technologies for niche tasks requiring high performance and energy efficiency. It focuses on superconducting neural networks utilizing radial basis functions, examining static and dynamic activation functions of neurons as well as the design of adjustable inductors for practical implementation.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Olga Skryabina, Andrey E. Schegolev, Nikolay Klenov, Sergey Bakurskiy, Andrey G. Shishkin, Stepan Sotnichuk, Kirill S. Napolskii, Ivan A. Nazhestkin, Igor I. Soloviev, Mikhail Yu Kupriyanov, Vasily S. Stolyarov
Summary: Researchers have fabricated two- and three-junction superconducting quantum interferometers based on gold nanowires, which can be used for implementing bio-inspired neurons. Their operation modes have been investigated experimentally and theoretically, and compared with the mathematical model of biological neurons proposed by Izhikevich.
Article
Chemistry, Physical
Vasily Stolyarov, Vladimir Oboznov, Daniil Kasatonov, Alexey Neilo, Sergey Bakurskiy, Nikolay Klenov, Igor Soloviev, Mikhail Kupriyanov, Alexander Golubov, Tristan Cren, Dimitri Roditchev
Summary: This study examines the electronic properties of thin films of diluted magnetic alloys on a local scale, demonstrating significant spatial variations at the nanoscale. The observed inhomogeneities in the tunneling conductance put constraints on the use of diluted magnetic alloys in nanoscale devices.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Vasily S. Stolyarov, Vsevolod Ruzhitskiy, Razmik A. Hovhannisyan, Sergey Grebenchuk, Andrey G. Shishkin, Olga V. Skryabina, Igor A. Golovchanskiy, Alexander A. Golubov, Nikolay V. Klenov, Igor I. Soloviev, Mikhail Yu. Kupriyanov, Alexander Andriyash, Dimitri Roditchev
Summary: SNS Josephson junctions, made of a thin non-superconducting metal sandwiched by two superconductors, enable novel quantum functionalities by mixing the intrinsic electronic properties of the metal with the superconducting correlations induced by proximity. The electronic properties of these devices are governed by Andreev quasiparticles, which are absent in conventional junctions. In Nb-Cu-Nb proximity junctions, the motion of Josephson vortices under electric currents and magnetic fields exhibits distinct dynamic regimes.
Article
Chemistry, Multidisciplinary
Andrei Kudriashov, Ian Babich, Razmik A. Hovhannisyan, Andrey G. Shishkin, Sergei N. Kozlov, Alexander Fedorov, Denis V. Vyalikh, Ekaterina Khestanova, Mikhail Yu Kupriyanov, Vasily S. Stolyarov
Summary: This study reveals the presence of double critical current in the Josephson junctions based on topological insulator, which is attributed to the intrinsic superconductivity of the S-TI interface. The complex structure of this interface should be taken into account in the technological process.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Stepan Sotnichuk, Olga Skryabina, Andrey G. Shishkin, Sergey Bakurskiy, Mikhail Yu Kupriyanov, Vasily S. Stolyarov, Kirill S. Napolskii
Summary: This study proposes a technique for obtaining long single Au nanowires and hybrid Josephson junctions, and demonstrates the prospects of using these nanowires in superconducting microelectronics through quantitative measurements. The study also discusses the relationship between the nanowire structure and the electron transport properties of the superconducting junctions.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Alexey Neilo, Sergey Bakurskiy, Nikolay Klenov, Igor Soloviev, Mikhail Kupriyanov
Summary: The proximity effect in SNSOF and SF'F structures with spin-orbit interaction in the normal layer was theoretically investigated. It was found that the triplet correlations generated in the ferromagnetic layer can be effectively suppressed by a normal layer with spin-orbit interaction. The critical temperature of the superconducting layer in the SNSOF multilayer was higher compared to a similar multilayer without spin-orbit interaction in the normal layer. Additionally, a SNSOF structure with a mixed type of spin-orbit interaction was identified as a spin valve, with its critical temperature determined by the direction of the magnetization vector in the ferromagnetic layer. The control characteristics of the SNSOF spin valve were calculated and compared with traditional SF'F devices with two ferromagnetic layers. It was concluded that SNSOF structures with one controlled ferromagnetic layer have advantages over widely considered SF'F spin valves, making them promising for high-performance storage components in superconducting electronics.
Article
Chemistry, Multidisciplinary
Vsevolod Ruzhickiy, Sergey Bakurskiy, Mikhail Kupriyanov, Nikolay Klenov, Igor Soloviev, Vasily Stolyarov, Alexander Golubov
Summary: In this paper, the electronic transport in planar Josephson SN-N-NS bridges with arbitrary transparency of the SN interfaces is studied. The spatial distribution of the supercurrent in the SN electrodes is formulated and solved, which allows determining the weak coupling region and describing the structure as a serial connection between the Josephson contact and the linear inductance of the electrodes. The presence of a two-dimensional spatial current distribution in the SN electrodes leads to a modification of the current-phase relation and the critical current magnitude of the bridges, transforming the structure from an SNS-type weak link to a double-barrier SINIS contact.
Article
Chemistry, Multidisciplinary
Andrey E. Schegolev, Nikolay V. Klenov, Georgy I. Gubochkin, Mikhail Yu. Kupriyanov, Igor I. Soloviev
Summary: This study explores the behavior models of biological neurons using superconducting circuits and identifies new modes of operation. The study also demonstrates the possibility of switching between different modes within the system, providing dynamic control. Additionally, a synaptic connection that mimics short-term potentiation is developed and demonstrated. Simulation results of a two-neuron chain with the proposed bio-inspired components are presented, and the potential of superconducting hardware biosimilars is discussed.
Article
Chemistry, Multidisciplinary
Alexey Neilo, Sergey Bakurskiy, Nikolay Klenov, Igor Soloviev, Mikhail Kupriyanov
Summary: We theoretically studied the transport properties of the SIsN(SO)F structure, which consists of thick and thin superconductor films, an insulator layer, a thin film of normal metal with spin-orbit interaction (SOI), and a monodomain ferromagnetic layer. The interplay between superconductivity, ferromagnetism, and spin-orbit interaction allows for smooth variation of the critical current of this Josephson junction by rotating the magnetization direction in the single F-layer. We investigated the amplitude of the spin valve effect and identified the optimal parameter ranges.
Correction
Physics, Multidisciplinary
A. A. Maksimovskaya, V. I. Ruzhickiy, N. V. Klenov, S. V. Bakurskiy, M. Yu. Kupriyanov, I. I. Soloviev
Article
Physics, Multidisciplinary
A. A. Maksimovskaya, V. Ruzhickiy, N. Klenov, S. Bakurskiy, M. Yu Kupriyanov, I. I. Soloviev
Summary: This study proposes the concept of phase logic based on π junctions, which solves the problem of manufacturing reproducible bistable Josephson junctions by realizing reproducible π junctions on Josephson heterostructures. The results demonstrate that using π junctions allows for the implementation of the complete set of logic devices necessary for digital computing devices based on phase logic.
