47 citations · 167 across the 7 of their papers we have counts for
7 papers
Superconductivity and magnetism in the surface states of ABC-stacked multilayer graphene
Oladunjoye A. Awoga, Tomas Löthman, Annica M. Black-Schaffer
ABC-stacked multilayer graphene (ABC-MLG) exhibits topological surface flat bands with a divergent density of states, leading to many-body instabilities at charge neutrality. Here,…
Defect-induced band restructuring and length scales in twisted bilayer graphene
Lucas Baldo, Tomas Löthman, Patric Holmvall +1
We investigate the effects of single, multiple, and extended defects in the form of non-magnetic impurities and vacancies in twisted bilayer graphene (TBG) at and away from the mag…
Nematic superconductivity in magic-angle twisted bilayer graphene from atomistic modeling
Tomas Löthman, Johann Schmidt, Fariborz Parhizgar +1
Twisted bilayer graphene (TBG) develops large moiré patterns at small twist angles with flat energy bands hosting domes of superconductivity. The large system size and intricate ba…
Efficient numerical method for evaluating normal and anomalous time-domain equilibrium Green's functions in inhomogeneous systems
Tomas Löthman, Christopher Triola, Jorge Cayao +1
In this work we develop EPOCH: Equilibrium Propagator by Orthogonal polynomial CHain, a computationally efficient method to calculate the time-dependent equilibrium Green's functio…
Disorder-robust -wave pairing with odd frequency dependence in normal metal-conventional superconductor junctions
Tomas Löthman, Christopher Triola, Jorge Cayao +1
We investigate the induced superconducting pair correlations in junctions between a conventional spin-singlet -wave superconductor and a disordered normal metal. Decomposing the…
Universal phase diagrams with superconducting domes for electronic flat bands
Tomas Löthman, Annica M. Black-Schaffer
Condensed matter systems with flat bands close to the Fermi level generally exhibit, due to their very large density of states, extraordinary high critical ordering temperatures of…
Defects in the (d+id)-wave superconducting state in heavily doped graphene
Tomas Löthman, Annica M. Black-Schaffer
A chiral time-reversal symmetry breaking (d+id)-wave superconducting state is likely to emerge in graphene doped close to the Van Hove singularity. As heavy doping procedures are e…