Stephan Rachel

Rashba spin-orbit coupling in the square-lattice Hubbard model: A truncated-unity functional renormalization group study

Jacob Beyer, Jonas B Hauck, Lennart Klebl, Tilman Schwemmer, Dante M Kennes, Ronny Thomale, Carsten Honerkamp, Stephan Rachel

Journal article  |  2023  |  Physical Review B

Increased localization of Majorana modes in antiferromagnetic chains on superconductors

D Crawford, E Mascot, M Shimizu, R Wiesendanger, DK Morr, HO Jeschke, S Rachel

Journal article  |  2023  |  Physical Review B

Magnet-superconductor hybrid (MSH) systems are a key platform for custom-designed topological superconductors. Ideally, the ends o..

Detrimental effects of disorder in two-dimensional time-reversal invariant topological superconductors

M Mashkoori, F Parhizgar, S Rachel, AM Black-Schaffer

Journal article  |  2023  |  Physical Review B

The robustness against local perturbations, as long as the symmetry of the system is preserved, is a distinctive feature of topolo..

Majorana modes with side features in magnet-superconductor hybrid systems

Daniel Crawford, Eric Mascot, Makoto Shimizu, Philip Beck, Jens Wiebe, Roland Wiesendanger, Harald O Jeschke, Dirk K Morr, Stephan Rachel

Journal article  |  2022  |  NPJ QUANTUM MATERIALS

Magnet-superconductor hybrid (MSH) systems represent promising platforms to host Majorana zero modes (MZMs), the elemental buildin..

Hilbert space fragmentation and interaction-induced localization in the extended Fermi-Hubbard model

Philipp Frey, Lucas Hackl, Stephan Rachel

Journal article  |  2022  |  PHYSICAL REVIEW B

We study Hilbert space fragmentation in the extended Fermi-Hubbard model with nearest- and next-nearest-neighbor interactions. Usi..

Quasiparticle excitations in a one-dimensional interacting topological insulator: Application for dopant-based quantum simulation

David Mikhail, Benoit Voisin, Dominique Didier St Medar, Gilles Buchs, Sven Rogge, Stephan Rachel

Journal article  |  2022  |  PHYSICAL REVIEW B

We study the effects of electron-electron interactions on the charge excitation spectrum of the spinful Su-Schrieffer-Heeger (SSH)..

Topological surface superconductivity in FeSe0.45Te0.55

Eric Mascot, Sagen Cocklin, Martin Graham, Mahdi Mashkoori, Stephan Rachel, Dirk K Morr

Journal article  |  2022  |  COMMUNICATIONS PHYSICS

The engineering of Majorana zero modes in topological superconductors, a paradigm for the realization of topological quantum compu..

Dominant Kitaev interactions in the honeycomb materials Na3Co2SbO6 and Na2Co2TeO6

Alaric L Sanders, Richard A Mole, Jiatu Liu, Alex J Brown, Dehong Yu, Chris D Ling, Stephan Rachel

Journal article  |  2022  |  PHYSICAL REVIEW B

Cobaltates with 3d based layered honeycomb structure were recently proposed as Kitaev magnets and putative candidates to host the ..

Triplet Superconductivity from Nonlocal Coulomb Repulsion in an Atomic Sn Layer Deposited onto a Si(111) Substrate

Sebastian Wolf, Domenico Di Sante, Tilman Schwemmer, Ronny Thomale, Stephan Rachel

Journal article  |  2022  |  PHYSICAL REVIEW LETTERS

Atomic layers deposited on semiconductor substrates introduce a platform for the realization of the extended electronic Hubbard mo..

Topological superconductivity on the honeycomb lattice: Effect of normal state topology

Sebastian Wolf, Tyler Gardener, Karyn Le Hur, Stephan Rachel

Journal article  |  2022  |  PHYSICAL REVIEW B

The search for topological superconductors is one of the most pressing and challenging questions in condensed-matter and material ..