Impurity-induced excitations in a topological two-dimensional ferromagnet/superconductor van der Waals moiré heterostructure
arXiv:2202.11003 · doi:10.1103/PhysRevMaterials.6.094010
Abstract
The emergence of a topological superconducting state in van der Waals heterostructures provides a new platform for exploring novel strategies to control topological superconductors. In particular, impurities in van der Waals heterostructures, generically featuring a moire pattern, can potentially lead to the unique interplay between atomic and moire length scales, a feature absent in generic topological superconductors. Here we address the impact of non-magnetic impurities on a topological moire superconductor, both in the weak and strong regime, considering both periodic arrays and single impurities in otherwise pristine infinite moire systems. We demonstrate a fine interplay between impurity-induced modes and the moire length, leading to radically different spectral and topological properties depending on the relative impurity location and moire lengths. Our results highlight the key role of impurities in van der Waals heterostructures featuring moire patterns, revealing the key interplay between length and energy scales in artificial moire systems.
14 pages, 7 figures
References in corpus (24)
- Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
- Evidence of Majorana fermions in an Al - InAs nanowire topological superconductor
- Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
- Majorana bound states in a coupled quantum-dot hybrid-nanowire system
- Flat Bands in Slightly Twisted Bilayer Graphene
- Atomic-scale control of graphene magnetism using hydrogen atoms
- Electrically detected interferometry of Majorana fermions in a topological insulator
- Observation of a Majorana zero mode in a topologically protected edge channel
- Quantum Anomalous Hall Effects in Graphene from Proximity-Induced Uniform and Staggered Spin-Orbit and Exchange Coupling
- Evidence of topological Shiba bands in artificial spin chains on superconductors
- Twist-angle dependent proximity induced spin-orbit coupling in graphene/transition-metal dichalcogenide heterostructures
- Accessing new magnetic regimes by tuning the ligand spin-orbit coupling in van der Waals magnets
- Electronic and magnetic characterization of epitaxial CrBr monolayers
- Filling of magnetic-impurity-induced gap in topological insulators by potential scattering
- Yu-Shiba-Rusinov states in real metals
- Impurity-induced triple point fermions in twisted bilayer graphene
- Electrical band flattening, valley flux, and superconductivity in twisted trilayer graphene
- Bilayer graphene encapsulated within monolayers of WS or CrGeTe: Tunable proximity spin-orbit or exchange coupling
- Nonunitary Superconductivity in Complex Quantum Materials
- Selective Hydrogen Adsoprtion in Graphene Rotated Bilayers
- Impurity-induced resonant spinon zero modes in Dirac quantum spin-liquids
- Quasiperiodic criticality and spin-triplet superconductivity in superconductor-antiferromagnet moire patterns
- Tunable topological states hosted by unconventional superconductors with adatoms
- Superlattice platform for chiral superconductivity with tuneable and high Chern numbers
Cited by in corpus (5)
- Extended magic phase in twisted graphene multilayers
- Ferroelectric valley valves with graphene/MoTe van der Waals heterostructures
- Hamiltonian learning with real-space impurity tomography in topological moire superconductors
- Moire-enabled topological superconductivity in twisted bilayer graphene
- Effects of electron-electron interactions in the Yu-Shiba-Rusinov lattice model