81 citations · 334 across the 12 of their papers we have counts for
12 papers
Identification of topological superconductivity in magnetic impurity systems using bulk spin-polarization
Mahdi Mashkoori, Saurabh Pradhan, Kristofer Björnson +2
Magnetic impurities on the surface of spin-orbit coupled but otherwise conventional superconductors provide a promising way to engineer topological superconductors with Majorana bo…
Probing chiral edge states in topological superconductors through spin-polarized local density of state measurements
Kristofer Björnson, Annica M. Black-Schaffer
We show that spin-polarized local density of states (LDOS) measurements can uniquely determine the chiral nature of topologically protected edge states surrounding a ferromagnetic…
Disorder robustness and protection of Majorana bound states in ferromagnetic chains on conventional superconductors
Oladunjoye A. Awoga, Kristofer Björnson, Annica M. Black-Schaffer
Majorana bound states (MBS) are well-established in the clean limit in chains of ferromagnetically aligned impurities deposited on conventional superconductors with finite spin-orb…
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…
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…
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…
Solid state Stern-Gerlach spin-splitter for magnetic field sensoring, spintronics, and quantum computing
Kristofer Björnson, Annica M. Black-Schaffer
We show that the edge of a two-dimensional topological insulator can be used to construct a solid state Stern-Gerlach spin-splitter. By threading such a Stern-Gerlach apparatus wit…
Spin-polarized edge currents and Majorana fermions in one- and two-dimensional topological superconductors
Kristofer Björnson, Sergey. S. Pershoguba, Alexander. V. Balatsky +1
We investigate the persistent currents, spin-polarized local density of states, and spectral functions of topological superconductors constructed by placing ferromagnetic impuritie…
Currents induced by magnetic impurities in superconductors with spin-orbit coupling
Sergey S. Pershoguba, Kristofer Björnson, Annica M. Black-Schaffer +1
We show that superconducting currents are generated around magnetic impurities and ferromagnetic islands proximity-coupled to superconductors with finite spin-orbit coupling. Using…
Probing vortex Majorana fermions and topology in semiconductor-superconductor heterostructures
Kristofer Björnson, Annica M. Black-Schaffer
We investigate the local density of states, spectral function, and superconducting pair amplitudes for signatures of Majorana fermions in vortex cores in ferromagnetic and spin-orb…
Skyrmion spin texture in ferromagnetic semiconductor-superconductor heterostructures
Kristofer Björnson, Annica M. Black-Schaffer
We provide a derivation of a spin Skyrmion number classification for two-dimensional topological superconductors constructed from ferromagnetic and Rashba spin-orbit coupled semico…
Vortex states and Majorana fermions in spin-orbit coupled semiconductor-superconductor hybrid structures
Kristofer Björnson, Annica M. Black-Schaffer
We study the energy spectrum of a vortex core in a two-dimensional semiconductor with Rashba spin-orbit interaction and proximity-coupled to a conventional superconductor and a fer…