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Impurity bound states in fully gapped -wave superconductors with subdominant order parameters
Mahdi Mashkoori, Kristofer Björnson, Annica M. Black-Schaffer
Impurities in superconductors and their induced bound states are important both for engineering novel states such as Majorana zero-energy modes and for probing bulk properties of t…
Universal phase diagrams with superconducting domes for electronic flat bands
Tomas Löthman, Annica M. Black-Schaffer
Condensed matter systems with flat bands close to the Fermi level generally exhibit, due to their very large density of states, extraordinary high critical ordering temperatures of…
Superconducting order parameter -phase shift in magnetic impurity wires
Kristofer Björnson, Alexander. V. Balatsky, Annica M. Black-Schaffer
It has previously been found that a magnetic impurity in a conventional -wave superconductor can give rise to a local -phase shift of the superconducting order parameter. By…
Highly tunable time-reversal-invariant topological superconductivity in topological insulator thin films
Fariborz Parhizgar, Annica M. Black-Schaffer
We study time-reversal-invariant topological superconductivity in topological insulator (TI) thin films including both intra- and inter-surface pairing. We find a nontrivial topolo…
From chiral d-wave to nodal line superconductivity in the harmonic honeycomb lattices
Johann Schmidt, Adrien Bouhon, Annica Black-Schaffer
Motivated by the recent realization of the three-dimensional hyperhoneycomb and stripyhoneycomb lattices in lithium iridate (LiIrO), we study the possible spin-singlet supe…
Majorana fermions at odd junctions in a wire network of ferromagnetic impurities
Kristofer Björnson, Annica M. Black-Schaffer
We consider a wire network of ferromagnetic impurities on the surface of an -wave superconductor with strong Rashba spin-orbit interaction. Within the topological phase, zero-en…