Publications
Chosen filters:
Chosen filters:
Electromagnetic superconductivity of vacuum induced by strong magnetic field : numerical evidence in lattice gauge theory Ghent University
Efficient numerical approach to inhomogeneous superconductivity: the Chebyshev-Bogoliubov-de Gennes method University of Antwerp
We propose a highly efficient numerical method to describe inhomogeneous superconductivity by using the kernel polynomial method in order to calculate the Greens functions of a superconductor. Broken translational invariance of any type (impurities, surfaces, or magnetic fields) can be easily incorporated. We show that limitations due to system size can be easily circumvented and therefore this method opens the way for the study of scenarios ...
Nanoscale superconductivity: nanowires and nanofilms University of Antwerp
Unusual structural rearrangement and superconductivity in infinite layer cuprate superlattices University of Antwerp
Epitaxial stabilization of thermodynamically metastable phases and advances in atomic control of complex oxide thin-film growth can be used effectively for realizing novel phenomena and as an alternative for bulk synthesis under extreme thermodynamic conditions. Here, we investigate infinite layer (IL) based cuprate superlattices, where 7–8 unit cells of Sr 0.6 Ca 0.4 Cu O 2 (SCCO) are sandwiched between ultrathin spacer layers of SrTi O 3 ...
Phonon-mediated superconductivity in ternary silicides X₄ CoSi (X = Nb, Ta) University of Antwerp
The superconducting properties of two recently synthesized ternary silicides with unit formula X4CoSi (X = Nb, Ta) are investigated through ab initio calculations combined with Eliashberg theory. Interestingly, their crystal structure comprises interlocking honeycomb networks of Nb/Ta atoms. Nb4CoSi is found to harbor better conditions for phonon-mediated superconductivity, as it possesses a higher density of states at the Fermi level, fostering ...
Superconductivity in functionalized niobium-carbide MXenes University of Antwerp
We detail the effects of Cl and S functionalization on the superconducting properties of layered (bulk) and monolayer niobium carbide (Nb2C) MXene crystals, based on first-principles calculations combined with Eliashberg theory. For bulk layered Nb2CCl2, the calculated superconducting transition temperature (T-c) is in very good agreement with the recently measured value of 6 K. We show that T-c is enhanced to 10 K for monolayer Nb2CCl2, due to ...
Spin-triplet superconductivity from intervalley Goldstone modes in magic-angle graphene Ghent University
We consider magic-angle graphene in the doping regime around charge neutrality, and we study the connection between a recently proposed intervalley coherent insulator at zero doping and the neighboring superconducting domes. The magic-angle graphene continuum model has an emergent U(1) valley-charge conservation symmetry and an emergent SU(2) symmetry corresponding to opposite spin rotations in the two valleys. The intervalley coherent insulator ...
Enhancing superconductivity in MXenes through hydrogenation University of Antwerp
Two-dimensional transition metal carbides and nitrides (MXenes) are an emerging class of atomically-thin superconductors, whose characteristics are highly prone to tailoring by surface functionalization. Here we explore the use of hydrogen adatoms to enhance phonon-mediated superconductivity in MXenes, based on first-principles calculations combined with Eliashberg theory. We first demonstrate the stability of three different structural models ...