Article
Optics
V. B. Novikov, T. V. Murzina
Summary: Optical vortices with donut shapes, known as spatiotemporal optical vortices (STOV) pulses, have attracted much attention in photonics due to their promising applications. In this study, STOV pulses were generated by transmitting femtosecond pulses through a thin epsilon-near-zero (ENZ) metamaterial slab containing a silver nanorod array. The interference of main and additional optical waves in these ENZ metamaterials, enabled by their strong optical nonlocality, led to the appearance of phase singularities in the transmission spectra. A cascaded metamaterial structure was proposed for high-order STOV generation.
Article
Materials Science, Multidisciplinary
Mark H. Fischer, Patrick A. Lee, Jonathan Ruhman
Summary: Recently, unusual pi phase shifts were observed in Little-Parks experiments on two systems derived from the layered superconductor 2H-TaS2. The pi phase shift was initially interpreted as evidence for exotic superconductivity in the individual 1H layers. However, this study suggests an alternative explanation, proposing that the superconductivity in the 1H layers is of conventional s-wave nature derived from the parent 2H-TaS2.
Article
Multidisciplinary Sciences
Ilya Shipulin, Nadia Stegani, Ilaria Maccari, Kunihiro Kihou, Chul-Ho Lee, Quanxin Hu, Yu Zheng, Fazhi Yang, Yongwei Li, Chi-Ming Yim, Ruben Huehne, Hans-Henning Klauss, Marina Putti, Federico Caglieris, Egor Babaev, Vadim Grinenko
Summary: The study discovered a new fermionic quadrupling condensate that breaks the Z(2) time-reversal symmetry. By detecting the specific heat, researchers found specific anomalies above the superconducting critical temperature, which are associated with the broken time-reversal symmetry.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Applied
Samuel Manceau, Thomas Brun, Johanna Fischer, Clarisse Ducruet, Philippe Sabon, Claude Cavoit, Guillaume Jannet, Jean-Louis Pincon, Ioan Lucian Prejbeanu, Matthieu Kretzschmar, Claire Baraduc
Summary: In this study, miniaturized, ultra-sensitive and easily integrable magnetometers are developed by combining innovative magnetic tunnel junctions with a high gain flux concentrator. The sensitivity of the magnetometers is improved by adjusting the exchange field value and the shape anisotropy of the junctions. Adding a flux concentrator around the junctions further increases the sensitivity. The complete sensor system composed of these magnetic tunnel junctions and the flux concentrator achieves sensitivities larger than 1000%/mT.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Chengyun Hua, Eugene Dumitrescu, Gabor B. Halasz
Summary: The celebrated Little-Parks effect in mesoscopic superconducting rings has gained attention for its potential to probe half-quantum vortices in spin-triplet superconductors. However, the general signatures of spin-triplet pairing in the Little-Parks effect have been less systematically investigated. This study uses Ginzburg-Landau theory to study the Little-Parks effect in a spin-triplet superconducting ring and identifies the conditions under which the signatures can be practically resolved.
Article
Materials Science, Multidisciplinary
Tyler R. Naibert, Hryhoriy Polshyn, Rita Garrido-Menacho, Malcolm Durkin, Brian Wolin, Victor Chua, Ian Mondragon-Shem, Taylor Hughes, Nadya Mason, Raffi Budakian
Summary: This study utilizes scanning probe techniques to investigate the dynamics of vortices in superconducting systems, successfully imaging and controlling vortices while extracting key energy scales of vortex interactions in the system. The experimental results reveal the energy landscape of vortices in the system, interpret and extract the relative strengths of vortex dynamics and energy scales, and demonstrate the tunability of interactions and their variation with applied bias.
Article
Materials Science, Multidisciplinary
Yu-Bo Liu, Jing Zhou, Yongyou Zhang, Wei-Qiang Chen, Fan Yang
Summary: This paper proposes a general scheme to create chiral topological superconductivity (TSC) from non-topological superconductivities (SCs) using twistronics technique. By stacking two monolayers with the largest twist angle, the interlayer Josephson coupling can drive chiral TSC with the same pairing angular momentum L in the system.
Article
Materials Science, Multidisciplinary
L. Burlachkov, S. Burov
Summary: In type II superconductors, the attraction and annihilation of Abrikosov vortices with different polarities at B = 0 lines result in the redistribution of magnetization current over the sample, slowing down the rate of magnetic relaxation. This effect is most pronounced in the remanent state, especially for flux flow and early stages of flux creep.
Article
Automation & Control Systems
He Zhang, Yuexuan Lou, Lishan Zhou, Zhaoqi Kou, Junren Mu
Summary: This article presents the modeling and optimization design of a large load magnetic levitation gravity compensator. The proposed compensator consists of three layers of 2-D permanent magnet arrays. It generates a large passive levitation force to compensate for the gravity of large loads in magnetic levitation systems. An improved magnetic charge model is proposed to accurately predict the passive levitation force and a genetic algorithm is adopted for parameter optimization. A prototype is manufactured and tested, showing excellent performance.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Physics, Applied
Tomas Scepka, Juraj Feilhauer, Jaroslav Tobik, Sergei Krylov, Tetiana Kalmykova, Vladimir Cambel, Michal Mruczkiewicz
Summary: We experimentally and numerically demonstrate the control of magnetization circulation in the closure domain state of thin permalloy squares. By applying an appropriate external magnetic field and interacting with a magnetic force microscopy (MFM) tip, we achieve control over the magnetization circulation. Numerical simulations confirm the validity of the proposed switching protocol for a wide range of MFM tips. Experimental results show that this method is robust against slight imperfections in the fabrication process and exhibits proper symmetry response under different experimental conditions.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Mathematics
Ilias (Li) Chenn, I. M. Sigal
Summary: The passage discusses the use of Bogoliubov-de Gennes equations to provide an equivalent formulation of the BCS theory of superconductivity, focusing on static solutions with a magnetic field present. It carefully formulates the equations in a basis independent form, discusses their general features, and isolates key physical classes of solutions (normal and vortex lattice states) which are candidates for the ground state. It proves the existence of normal and vortex lattice states and their stability in certain temperature and magnetic field ranges.
ADVANCES IN MATHEMATICS
(2021)
Article
Physics, Applied
D. A. D. Chaves, I. M. de Araujo, D. Carmo, F. Colauto, A. A. M. de Oliveira, A. M. H. de Andrade, T. H. Johansen, A. V. Silhanek, W. A. Ortiz, M. Motta
Summary: Quantitative magneto-optical imaging of a type-II superconductor thin film cooled under zero, homogeneous, and inhomogeneous applied magnetic fields indicates that inhomogeneous fields enhance screening capacity. Vortex-antivortex interactions play a crucial role in shielding ability, with vortices resulting in shorter flux penetration depths. The proposed strategy could enhance the performance of thin superconducting devices.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Yiming Wang, Mingtao Li, Cuiying Pei, Lingling Gao, Kejun Bu, Dong Wang, Xuqiang Liu, Limin Yan, Jia Qu, Nana Li, Bihan Wang, Yifei Fang, Yanpeng Qi, Wenge Yang
Summary: The critical current density and vortex pinning dynamics in the superconductor Sn0.55In0.45Te have been investigated. The analysis of the temperature-dependent lower critical field reveals a weakly anisotropic single energy gap. The high values of critical current density Jc(0) and pinning potential U0(H) were observed at different conditions. Based on the collective pinning model, the coexistence of two vortex pinning regimes in Sn0.55In0.45Te was confirmed, one induced by the spatial fluctuations of the transition temperature and the other associated with the spatial variations of the charge-carrier mean free path.
Article
Materials Science, Multidisciplinary
Hyunsoo Kim, Makariy A. Tanatar, Halyna Hodovanets, Kefeng Wang, Johnpierre Paglione, Ruslan Prozorov
Summary: In this study, the magnetic penetration depth in single crystals of YPtBi superconductor was measured as a function of temperature and magnetic field. The results showed that the Campbell penetration depth and the critical current density were significantly influenced by the applied magnetic field. This research provides valuable data for the study of superconductors.
Article
Optics
S. S. Seidov, M. Fistul
Summary: This theoretical study examines the coherent quantum dynamics of a single magnetic fluxon trapped in Josephson-junction parallel arrays with large kinetic inductances. The dynamics of the magnetic fluxon are analyzed in detail, including energy bands, quantum tunneling, and oscillations controlled by external factors like voltage and bias current. The study shows how these quantum effects manifest in the current-voltage characteristics of the arrays.
Review
Chemistry, Multidisciplinary
Kate E. Horner, Mark A. Miller, Jonathan W. Steed, Paul M. Sutcliffe
CHEMICAL SOCIETY REVIEWS
(2016)
Editorial Material
Chemistry, Physical
Paul Sutcliffe
Article
Physics, Multidisciplinary
Paul Sutcliffe
PHYSICAL REVIEW LETTERS
(2017)
Article
Physics, Multidisciplinary
Fabian Maucher, Paul Sutcliffe
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2018)
Article
Physics, Particles & Fields
Carlos Naya, Paul Sutcliffe
JOURNAL OF HIGH ENERGY PHYSICS
(2018)
Article
Physics, Multidisciplinary
Paul Sutcliffe
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2018)
Article
Physics, Multidisciplinary
Carlos Naya, Paul Sutcliffe
PHYSICAL REVIEW LETTERS
(2018)
Article
Mathematics, Applied
Fabian Maucher, Paul Sutcliffe
Article
Physics, Multidisciplinary
Antonio Cincotti, Fabian Maucher, David Evans, Brette M. Chapin, Kate Horner, Elizabeth Bromley, Andrew Lobb, Jonathan W. Steed, Paul Sutcliffe
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
Paul Sutcliffe
Summary: In this study, it is shown that magnetic monopoles in hyperbolic space correspond to certain algebraic curves and rational maps between Riemann spheres. The research presents formulas for the spectral curve and rational map of a hyperbolic monopole, extending previous results that applied only to a subclass of instantons of JNR type.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Multidisciplinary Sciences
Noah Kent, Neal Reynolds, David Raftrey, Ian T. G. Campbell, Selven Virasawmy, Scott Dhuey, Rajesh V. Chopdekar, Aurelio Hierro-Rodriguez, Andrea Sorrentino, Eva Pereiro, Salvador Ferrer, Frances Hellman, Paul Sutcliffe, Peter Fischer
Summary: This study presents experimental evidence for the appearance of Hopfions, topological solitons defined by a Hopf number, in a magnetic system. Three-dimensional spin textures distinguishing Hopfions from target skyrmions are characterized by magnetic images recorded with surface-sensitive X-ray photoemission electron microscopy and bulk-sensitive soft X-ray transmission microscopy using element-specific X-ray magnetic circular dichroism effects.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Particles & Fields
Paul Sutcliffe
Summary: This paper presents a hyperbolic analogue of the Atiyah-Hitchin manifold and calculates the boundary metric on its moduli space in hyperbolic space using a twistor description.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Paul Sutcliffe
Summary: The geodesic approximation is a powerful method for studying the dynamics of BPS solitons, but is not applicable in certain systems. This study explores the use of alternative metrics on soliton moduli spaces and finds that geodesics of the boundary metric provide a reasonable description of soliton dynamics.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Fluids & Plasmas
Fabian Maucher, Paul Sutcliffe
Article
Physics, Fluids & Plasmas
Fabian Maucher, Paul Sutcliffe