23 citations · 197 across the 25 of their papers we have counts for
26 papers
Type I-II/II-I vortices from dimension-six self-interaction
A. Alonso-Izquierdo, A. González-Parra, K. Slawinska +2
We show that adding a dimension-six self-interaction to the Abelian-Higgs or Ginzburg Landau model results in a remarkable and rich structure of multi-vortex solutions. Besides the…
Type I/II Vortex Dynamics With Excited Normal Modes
Steffen Krusch, Morgan Rees, Thomas Winyard
We investigate the effects of excited normal modes on vortex dynamics in the Abelian Higgs model in the type I (static attraction) and type II (static repulsion) regimes. We demons…
Unconventional mixed state in the nematic superconductor LiFeAs
G. Lamura, T. Winyard, P. Gentile +5
In the mixed state of type-II bulk superconductors, the magnetic field penetrates in the form of vortices enclosing one magnetic flux quantum: this is the conventional Abrikosov vo…
Towards a universal phase diagram of planar chiral magnets
Bernd Schroers, Martin Speight, Thomas Winyard
In planar chiral magnets, the competition of the positive definite Heisenberg exchange and Zeeman energies with the indefinite Dzyaloshinskii-Moriya interaction (DMI) energy allows…
Short range intervortex forces
Martin Speight, Thomas Winyard
An explicit formula for the interaction energy of vortices in the abelian Higgs (or Ginzburg-Landau) model is derived, valid in the regime where all vortices are close to one a…
Observation of vortex stripes in UTe
Y. F. Wang, H. X. Yao, T. Winyard +15
Quantum vortices are fundamentally important for properties of superconductors. In conventional type-II superconductor they determine the magnetic response of the system and tend t…
Scattering of Vortices with Excited Normal Modes
Steffen Krusch, Morgan Rees, Thomas Winyard
We consider head-on collisions at critical coupling of vortices modelled by the Abelian-Higgs model. We investigate the 2-vortex scattering, whereby the vortices are excited by the…
Vortex lattices and critical fields in anisotropic superconductors
Martin Speight, Thomas Winyard
A method is developed to compute minimal energy vortex lattices in a general Ginzburg-Landau model of a superconductor subjected to an applied magnetic field. The model may have an…
Magnetic response of nematic superconductors: skyrmion stripes and their signatures in muon spin relaxation experiments
Martin Speight, Thomas Winyard, Egor Babaev
We investigate the magnetic response of nematic superconductors, presenting a new approach to find vortex and skyrmion structures beyond symmetry-constraining ansätze. Using this a…
Symmetries, Length Scales, Magnetic Response and Skyrmion Chains in Nematic Superconductors
Martin Speight, Thomas Winyard, Egor Babaev
Nematic systems are two component superconductors that break rotational symmetry, but exhibit a mixed symmetry that couples spatial rotations and phase difference rotations. We sho…
A model for gauged skyrmions with low binding energies
Josh Cork, Derek Harland, Thomas Winyard
We consider gauged skyrmions with boundary conditions which break the gauge from to in models derived from Yang-Mills theory. After deriving genera…
Magnetic field behaviour in and superconductors: twisting of applied and spontaneous fields
Martin Speight, Thomas Winyard, Alex Wormald +1
We consider magnetic field screening and spontaneous magnetic fields in and superconductors both analytically and numerically. We show that in general, the linearized…
A consistent two-skyrmion configuration space from instantons
Chris Halcrow, Thomas Winyard
To study a nuclear system in the Skyrme model one must first construct a space of low energy Skyrme configurations. However, there is no mathematical definition of this configurati…
Ring solitons and soliton sacks in imbalanced fermionic systems
Mats Barkman, Albert Samoilenka, Thomas Winyard +1
We show that in superfluids with fermionic imbalance and uniform ground state, there are stable solitons. These solutions are formed of radial density modulations resulting in noda…
Intervortex forces in competing-order superconductors
Martin Speight, Thomas Winyard
The standard Ginzburg-Landau model of competing-order superconductors is studied. It is observed that this model possesses two distinct species of vortex, and consequently has two…
Skyrmions and spin waves in frustrated ferromagnets at low applied magnetic field
Martin Speight, Thomas Winyard
A continuum model of frustrated ferromagnets is analyzed in detail in the regime of low applied magnetic field, , where the ground state is a spatially varying conical spi…
Comment on the paper by D. Efremov and Yu.N. Ovchinnikov "Singular ground state of multiband inhomogeneous superconductors", Phys. Rev. B 99, 224508 (2019)
Mihail Silaev, Thomas Winyard, Egor Babaev
We show that the conclusion reported in Ref. 1, that there are no spontaneous magnetic fields in multiband superconductors that break time reversal symmetry, is incorrect. We demon…
Magnetic signatures of domain walls in and superconductors: observability and what that can tell us about the superconducting order parameter
Andrea Benfenati, Mats Barkman, Thomas Winyard +3
One of the defining features of spontaneously broken time-reversal symmetry (BTRS) is the existence of domain walls, the detection of which would be strong evidence for such system…
Chiral p-wave superconductors have complex coherence and magnetic field penetration lengths
Martin Speight, Thomas Winyard, Egor Babaev
We show that in superconductors that break time reversal symmetry and have anisotropy, such as p+ip materials, all order parameters and magnetic modes are mixed. Excitation of the…
Skyrmions formation due to unconventional magnetic modes in anisotropic multi-band superconductors
Thomas Winyard, Mihail Silaev, Egor Babaev
Multiband superconductors have a sufficient number of degrees of freedom to allow topological excitations characterized by Skyrmionic topological invariants. In the most common, cl…
Hierarchies of Length Scale Based Typology in Anisotropic Multiband Superconductor
Thomas Winyard, Mihail Silaev, Egor Babaev
Since Ginzburg and Landau's seminal work in 1950 superconducting states have been classified by the hierarchy of the fundamental length scales of the theory; the magnetic field pen…
Non-London electrodynamics in a multiband London model: anisotropy-induced non-localities and multiple magnetic field penetration lengths
Mihail Silaev, Thomas Winyard, Egor Babaev
The London model describes strongly type-2 superconductors as massive vector field theories, where the magnetic field decays exponentially at the length scale of the London penetra…
Skyrmion and Baby Skyrmion Formation from Domain Walls
Thomas Winyard
We numerically simulate the formation of -dimensional baby Skyrmions and -dimensional Skyrmions from domain wall collisions. It has been suggested that Skyrmi…
Baby Skyrmions in AdS
Matthew Elliot-Ripley, Thomas Winyard
We study the baby Skyrme model in a pure AdS background without a mass term. The tail decays and scalings of massless radial solutions are demonstrated to take a similar form to th…