Stefan Rex
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View article: Magnetic $2π$ domain walls for tunable Majorana devices
Magnetic $2π$ domain walls for tunable Majorana devices Open
Identifying realistic platforms capable of controlled operations with Majorana bound states is a key challenge in the study of topological superconductivity. Among the most promising proposals are magnet-superconductor hybrid devices, whic…
View article: A topological flux trap: Majorana bound states at screw dislocations
A topological flux trap: Majorana bound states at screw dislocations Open
The engineering of non-trivial topology in superconducting heterostructures is a very challenging task. Reducing the number of components in the system would facilitate the creation of the long-sought Majorana bound states. Here, we explor…
View article: Majorana modes in emergent-wire phases of helical and cycloidal magnet-superconductor hybrids
Majorana modes in emergent-wire phases of helical and cycloidal magnet-superconductor hybrids Open
Noncollinear magnetism opens exciting possibilities to generate topological\nsuperconductivity. Here, we focus on helical and cycloidal magnetic textures in\nmagnet-superconductor hybrid structures in a background magnetic field. We\ndemon…
View article: Majorana bound states in magnetic skyrmions imposed onto a superconductor
Majorana bound states in magnetic skyrmions imposed onto a superconductor Open
We consider a superconducting film exchange-coupled to a close-by chiral magnetic layer and study how magnetic skyrmions can induce the formation of Majorana bound states (MBS) in the superconductor. Inspired by a proposal by Yang et al. […
View article: Majorana bound states in magnetic skyrmions imposed onto a superconductor
Majorana bound states in magnetic skyrmions imposed onto a superconductor Open
We consider a superconducting film exchange-coupled to a close-by chiral magnetic layer and study how magnetic skyrmions can induce the formation of Majorana bound states (MBS) in the superconductor. Inspired by a proposal by Yang et al. […
View article: Magnon-induced superconductivity in a topological insulator coupled to ferromagnetic and antiferromagnetic insulators
Magnon-induced superconductivity in a topological insulator coupled to ferromagnetic and antiferromagnetic insulators Open
We study the effective interactions between Dirac fermions on the surface of\na three-dimensional topological insulator due to the proximity coupling to the\nmagnetic fluctuations in a ferromagnetic or antiferromagnetic insulator. Our\nres…
View article: Magnon-induced superconductivity in a topological insulator coupled to ferro- and antiferromagnetic insulators
Magnon-induced superconductivity in a topological insulator coupled to ferro- and antiferromagnetic insulators Open
We study the effective interactions between Dirac fermions on the surface of a three-dimensional topological insulator due to the proximity coupling to the magnetic fluctuations in a ferromagnetic or antiferromagnetic insulator. Our result…
View article: Topological staggered field electric effect with bipartite magnets
Topological staggered field electric effect with bipartite magnets Open
We study the interface physics of bipartite magnetic materials deposited on a topological insulator. This comprises antiferromagnets as well as ferrimagnets and ferromagnets with multiple magnetic moments per unit cell. If an energy gap is…
View article: Topological staggered field-electric effect with bipartite magnets
Topological staggered field-electric effect with bipartite magnets Open
We study the interface physics of bipartite magnetic materials deposited on a topological insulator. This comprises antiferromagnets as well as ferrimagnets and ferromagnets with multiple magnetic moments per unit cell. If an energy gap is…
View article: Topological magnetic dipolar interaction and nonlocal electric magnetization control in topological insulator heterostructures
Topological magnetic dipolar interaction and nonlocal electric magnetization control in topological insulator heterostructures Open
The magnetoelectric effect predicted in topological insulators makes heterostructures that combine magnetic materials and such insulators promising candidates for spintronics applications. Here, we theoretically consider a setup that exhib…
View article: Nonlocal topological magnetoelectric effect by Coulomb interaction at a topological insulator-ferromagnet interface
Nonlocal topological magnetoelectric effect by Coulomb interaction at a topological insulator-ferromagnet interface Open
The interface between a topological insulator and a ferromagnetic insulator exhibits an interesting interplay of topological Dirac electrons and magnetism. As has been shown recently, the breaking of time-reversal invariance by magnetic or…