127 citations · 824 across the 40 of their papers we have counts for
40 papers
Supercurrent detection and manipulation of topological phase transitions in Shiba-Majorana hybrid systems
Debika Debnath, Ioannis Ioannidis, Paramita Dutta +2
The non-Abelian statistics of Majorana zero modes has inspired numerous proposals for their detection and manipulation in topological superconductors. Implementations based on magn…
Finite-size effects in Schulz-Shastry-Luttinger models for determining anyonic signatures in 1d spin chains
B. Perković, M. Bonkhoff, T. Posske
We study finite-size properties of Schulz-Shastry-Luttinger liquids to reveal anyonic signatures, realized as low-energy excitations on top of the helical ground state in saturated…
Symmetry and integrability in the anyon-Hubbard model
Martin Bonkhoff, Grennon Gurney, Friethjof Theel +3
Recent cold atom experiments have realized one-dimensional anyons and enabled the tuning of 1D~statistics between bosons and fermions. Here, we analyze the symmetries, integrabilit…
The toric code under antiferromagnetic isotropic Heisenberg interactions
Won Jang, Robert Peters, Thore Posske
We investigate the impact of an isotropic antiferromagnetic Heisenberg perturbation on the toric code, focusing on the resulting quantum phase transition and the nature of the phas…
Hidden Twisted Sectors and Exponential Degeneracy in Root-of-Unity XXZ Heisenberg Chains
Yongao Hu, Felix Gerken, Thore Posske
Recently, product states have been identified as simple-structured eigenstates of XXZ Heisenberg spin models in arbitrary dimensions, occurring at anisotropy values corresponding t…
In-plane ferromagnetism-driven topological nodal-point superconductivity with tilted Weyl cones
Maciej Bazarnik, Levente Rózsa, Ioannis Ioannidis +11
The potential application of topological superconductivity in quantum transport and quantum information has fueled an intense investigation of hybrid materials with emergent electr…
Time-reversal symmetric topological superconductivity in Machida-Shibata lattices
Ioannis Ioannidis, Ching-Kai Chiu, Thore Posske
Recent experiments engineered special spin-degenerate Andreev bound states in atomic cages of adatoms on superconductors, the Machida-Shibata states, a promising building block for…
Chirally-protected state manipulation by tuning one-dimensional statistics
F. Theel, M. Bonkhoff, P. Schmelcher +2
Chiral symmetry is broken by typical interactions in lattice models, but the statistical interactions embodied in the anyon-Hubbard model are an exception. This is an example for a…
Non-local detection of coherent Yu-Shiba-Rusinov quantum projections
Khai Ton That, Chang Xu, Ioannis Ioannidis +5
Probing spatially confined quantum states from afar - a long-sought goal to minimize external interference - has been proposed to be achievable in condensed matter systems via cohe…
Generalized Josephson effect with arbitrary periodicity in quantum magnets
Anshuman Tripathi, Felix Gerken, Peter Schmitteckert +3
Easy-plane quantum magnets are strikingly similar to superconductors, allowing for spin supercurrent and an effective superconducting phase stemming from their rotation symm…
Large diversity of magnetic phases in two-dimensional magnets with spin-orbit coupling and superconductivity
Jannis Neuhaus-Steinmetz, Tim Matthies, Elena Y. Vedmedenko +2
We classify the magnetic ground states of a 2D lattice of localized magnetic moments which are coupled to a superconducting substrate with Rashba-spin-orbit coupling. We discover a…
Quantum skyrmion dynamics studied by neural network quantum states
Ashish Joshi, Robert Peters, Thore Posske
We study the dynamics of quantum skyrmions under a magnetic field gradient using neural network quantum states. First, we obtain a quantum skyrmion lattice ground state using varia…
All product eigenstates in Heisenberg models from a graphical construction
Felix Gerken, Ingo Runkel, Christoph Schweigert +1
Recently, large degeneracy based on product eigenstates has been found in spin ladders, kagome-like lattices, and motif magnetism, connected to spin liquids, anyonic phases, and qu…
Controlling Majorana hybridization in magnetic chain-superconductor systems
Oladunjoye A. Awoga, Ioannis Ioannidis, Archana Mishra +3
We propose controlling the hybridization between Majorana zero modes at the ends of magnetic adatom chains on superconductors by an additional magnetic adatom deposited close by. B…
Ground State Properties of Quantum Skyrmions described by Neural Network Quantum States
Ashish Joshi, Robert Peters, Thore Posske
We investigate the ground state properties of quantum skyrmions in a ferromagnet using variational Monte Carlo with the neural network quantum state as variational ansatz. We study…
The quantum skyrmion Hall effect in f electron systems
Robert Peters, Jannis Neuhaus-Steinmetz, Thore Posske
The flow of electric current through a two-dimensional material in a magnetic field gives rise to the family of Hall effects. The quantum versions of these effects accommodate robu…
Quantum spin helices more stable than the ground state: onset of helical protection
Stefan Kühn, Felix Gerken, Lena Funcke +4
Topological magnetic structures are promising candidates for resilient information storage. An elementary example are spin helices in one-dimensional easy-plane quantum magnets. To…
Testing the topological nature of end states in antiferromagnetic atomic chains on superconductors
Lucas Schneider, Philip Beck, Levente Rózsa +3
Edge states forming at the boundaries of topologically non-trivial phases of matter are promising candidates for future device applications because of their stability against local…
Proximity superconductivity in atom-by-atom crafted quantum dots
Lucas Schneider, Khai That Ton, Ioannis Ioannidis +4
Gapless materials in electronic contact with superconductors acquire proximity-induced superconductivity in a region near the interface. Numerous proposals build on this addition o…
Topological magnetic phase transition in Eu-based A-type antiferromagnets
Eliot Heinrich, Thore Posske, Benedetta Flebus
Recently, a colossal magnetoresistance (CMR) was observed in EuCdP -- a compound that does not fit the conventional mixed-valence paradigm. Instead, experimental evidence p…
Unique Signatures of Topological Phases in Two-Dimensional THz Spectroscopy
Felix Gerken, Thore Posske, Shaul Mukamel +1
We develop a microscopic theory for the two-dimensional spectroscopy of one-dimensional topological superconductors. We consider a ring geometry as a realization of the Kitaev chai…
Topological characterization of dynamic chiral magnetic textures using machine learning
Tim Matthies, Alexander F. Schäffer, Thore Posske +2
Recently proposed spintronic devices use magnetic skyrmions as bits of information. The reliable detection of those chiral magnetic objects is an indispensable requirement. Yet, th…
Creating arbitrary sequences of mobile magnetic skyrmions and antiskyrmions
Pia Siegl, Martin Stier, Alexander F. Schäffer +4
Magnetic skyrmions and their anti-particles, the antiskyrmions, are stable magnetic solitons existing down to the nanometer scale. Their stability and size as well as the possibili…
Controlled Creation of Quantum Skyrmions
Pia Siegl, Elena Y. Vedmedenko, Martin Stier +2
We study the creation of quantum skyrmions in quadratic nanoscopic lattices of quantum spins coupled by Dzyaloshinkii-Moriya and exchange interactions. We numerically show that dif…