Stephan Rachel

From high T-c to low T-c: Multiorbital effects in transition metal oxides

Michael Klett, Tilman Schwemmer, Sebastian Wolf, Xianxin Wu, David Riegler, Andreas Dittmaier, Domenico Di Sante, Gang Li, Werner Hanke, Stephan Rachel, Ronny Thomale

Journal article  |  2021  |  PHYSICAL REVIEW B

Despite the structural resemblance of certain cuprate and nickelate parent compounds there is a striking spread of Tc among such t..

Topological Shiba bands in artificial spin chains on superconductors

Lucas Schneider, Philip Beck, Thore Posske, Daniel Crawford, Eric Mascot, Stephan Rachel, Roland Wiesendanger, Jens Wiebe

Journal article  |  2021  |  NATURE PHYSICS

A major challenge in developing topological superconductors for implementing topological quantum computing is their characterizati..

Topological superconductivity in skyrmion lattices

Eric Mascot, Jasmin Bedow, Martin Graham, Stephan Rachel, Dirk K Morr

Journal article  |  2021  |  NPJ QUANTUM MATERIALS

Atomic manipulation and interface engineering techniques have provided an intriguing approach to custom-designing topological supe..

Spin-orbit coupled superconductivity: Rashba-Hubbard model on the square lattice

Sebastian Wolf, Stephan Rachel

Journal article  |  2020  |  PHYSICAL REVIEW B

The weak-coupling renormalization group method is an asymptotically exact method to find superconducting instabilities of a lattic..

Topological superconductivity induced by a triple-q magnetic structure

Jasmin Bedow, Eric Mascot, Thore Posske, Goetz S Uhrig, Roland Wiesendanger, Stephan Rachel, Dirk K Morr

Journal article  |  2020  |  PHYSICAL REVIEW B

We demonstrate that the recently discovered triple-q (3q) magnetic structure, when embedded in a magnet-superconductor hybrid (MSH..

Impurity bound states as detectors of topological band structures revisited

Seydou-Samba Diop, Lars Fritz, Matthias Vojta, Stephan Rachel

Journal article  |  2020  |  PHYSICAL REVIEW B

Band structures of topological insulators are characterized by nonlocal topological invariants. Consequently, proposals for the ex..

High-temperature Majorana fermions in magnet-superconductor hybrid systems

Daniel Crawford, Eric Mascot, Dirk K Morr, Stephan Rachel

Journal article  |  2020  |  PHYSICAL REVIEW B

Magnet-superconductor hybrid (MSH) structures represent one of the most promising platforms to realize, control, and manipulate Ma..

Laser Modulation of Superconductivity in a Cryogenic Wide-field Nitrogen-Vacancy Microscope.

Scott E Lillie, David A Broadway, Nikolai Dontschuk, Sam C Scholten, Brett C Johnson, Sebastian Wolf, Stephan Rachel, Lloyd CL Hollenberg, Jean-Philippe Tetienne

Journal article  |  2020  |  Nano Letters

We realize a cryogenic wide-field nitrogen-vacancy microscope and use it to image Abrikosov vortices and transport currents in a s..

Stability of disordered topological superconducting phases in magnet-superconductor hybrid systems

Eric Mascot, Chaitra Agrahar, Stephan Rachel, Dirk K Morr

Journal article  |  2019  |  PHYSICAL REVIEW B

Magnet-superconductor hybrid heterostructures constitute a promising candidate system for the quantum engineering of chiral topolo..

Dimensional tuning of Majorana fermions and real space counting of the Chern number

Eric Mascot, Sagen Cocklin, Stephan Rachel, Dirk K Morr

Journal article  |  2019  |  PHYSICAL REVIEW B

We demonstrate that it is possible to use atomic manipulation techniques to adiabatically tune between one-dimensional and two-dim..