Twofold quadruple Weyl nodes in chiral cubic crystals

T Zhang, R Takahashi, C Fang, S Murakami - Physical Review B, 2020 - APS
Unlike conventional Weyl nodes, unconventional ones carry a quantized monopole charge
C> 1, and their existence needs the protection of crystalline symmetries in addition to …

Observation of domain wall bimerons in chiral magnets

T Nagase, YG So, H Yasui, T Ishida… - Nature …, 2021 - nature.com
Topological defects embedded in or combined with domain walls have been proposed in
various systems, some of which are referred to as domain wall skyrmions or domain wall …

Composite topological solitons consisting of domain walls, strings, and monopoles in O (N) models

M Eto, Y Hamada, M Nitta - Journal of High Energy Physics, 2023 - Springer
A bstract We study various composites of global solitons consisting of domain walls, strings,
and monopoles in linear O (N) models with N= 2 and 3. Spontaneous symmetry breaking …

Coreless vortices as direct signature of chiral -wave superconductivity

P Holmvall, AM Black-Schaffer - Physical Review B, 2023 - APS
Chiral d-wave superconductivity has been proposed in a number of different materials, but
characteristic experimental fingerprints have been largely lacking. We show that quadruply …

Prediction of time-reversal-symmetry breaking fermionic quadrupling condensate in twisted bilayer graphene

I Maccari, J Carlström, E Babaev - Physical Review B, 2023 - APS
Recent mean-field calculations suggest that the superconducting state of twisted bilayer
graphene exhibits either a nematic order or a spontaneous breakdown of the time-reversal …

Robust and tunable coreless vortices and fractional vortices in chiral -wave superconductors

P Holmvall, N Wall-Wennerdal, AM Black-Schaffer - Physical Review B, 2023 - APS
Chiral d-wave superconductivity has recently been proposed in a wide range of materials
based on both experiment and theoretical studies. Chiral superconductors host a finite …

Nematic skyrmions in odd-parity superconductors

AA Zyuzin, J Garaud, E Babaev - Physical review letters, 2017 - APS
We study topological excitations in two-component nematic superconductors, with a
particular focus on Cu x Bi 2 Se 3 as a candidate material. We find that the lowest-energy …

Type-1.5 superconductivity in multicomponent systems

E Babaev, J Carlström, M Silaev, JM Speight - Physica C: Superconductivity …, 2017 - Elsevier
In general a superconducting state breaks multiple symmetries and, therefore, is
characterized by several different coherence lengths ξ i, i= 1,…, N. Moreover in multiband …

Electronic properties of emergent topological defects in chiral -wave superconductivity

LF Zhang, VF Becerra, L Covaci, MV Milošević - Physical Review B, 2016 - APS
Chiral p-wave superconductors in applied magnetic field can exhibit more complex
topological defects than just conventional superconducting vortices, due to the two …

Vortical versus skyrmionic states in mesoscopic -wave superconductors

V Fernández Becerra, E Sardella, FM Peeters… - Physical Review B, 2016 - APS
We investigate the superconducting states that arise as a consequence of mesoscopic
confinement and a multicomponent order parameter in the Ginzburg-Landau model for p …