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Interference effects induced by a precessing easy-plane magnet coupled to a helical edge state
Kevin A. Madsen, Piet W. Brouwer, Patrik Recher +1
The interaction of a magnetic insulator with the helical electronic edge of a two-dimensional topological insulator has been shown to lead to many interesting phenomena. One of the…
Topological superconductivity in tripartite superconductor-ferromagnet-semiconductor nanowires
Josias Langbehn, Sergio Acero Gonzalez, Piet W. Brouwer +1
Motivated by recent experiments searching for Majorana zero modes in tripartite semiconductor nanowires with epitaxial superconductor and ferromagnetic-insulator layers, we explore…
Theory of the low-temperature longitudinal spin Seebeck effect
Rico Schmidt, Piet W. Brouwer
Using a simplified microscopic model of coupled spin and lattice excitations in a ferromagnetic insulator we evaluate the magnetic-field dependence of the spin Seebeck effect at lo…
Higher-order topological band structures
Luka Trifunovic, Piet W. Brouwer
The interplay of topology and symmetry in a material's band structure may result in various patterns of topological states of different dimensionality on the boundary of a crystal.…
Coherent Electron Optics with Ballistically Coupled Quantum Point Contacts
Jaan Freudenfeld, Max Geier, Vladimir Umansky +2
The realization of integrated quantum circuits requires precise on-chip control of charge carriers. Aiming at the coherent coupling of distant nanostructures at zero magnetic field…
Electrostatic potential shape of gate defined quantum point contacts
Max Geier, Jaan Freudenfeld, Jorge T. Silva +5
Quantum point contacts (QPC) are fundamental building blocks of nanoelectronic circuits. For their emission dynamics as well as for interaction effects such as the 0.7-anomaly the…