A5015263203- Topological Materials and Phenomena
- Graphene research and applications
- Physics of Superconductivity and Magnetism
- Advanced Condensed Matter Physics
- Quantum and electron transport phenomena
- Quantum, superfluid, helium dynamics
- Rare-earth and actinide compounds
- Iron-based superconductors research
University of Copenhagen
2021-2024
Quantum Monte Carlo simulations of so-called ``magic angle'' twisted bilayer graphene reveal three novel insulating phases that may help elucidate the origin unusual electronic behaviors in this material.
Spontaneous generation of time-reversal symmetry breaking in unconventional superconductors is currently a topic considerable interest. While chiral superconducting order often assumed to be the source such signatures, they can sometimes also arise from nonmagnetic disorder. Here we perform theoretical study impact dislocations on parameter within microscopic one-band model which, homogeneous case, features either extended $s$-wave, $d$-wave, or $s+id$-wave superconductivity depending...
Recently, a theoretical study [Z.-X. Li et al., npj Quantum Mater. 6, 36 (2021)] investigated model of disordered $d$-wave superconductor, and reported local time-reversal symmetry breaking current loops for sufficiently high disorder levels. Since the pure superconducting state does not break symmetry, it is surprising that such persistent currents arise purely from nonmagnetic disorder. Here, we perform detailed investigation disorder-induced orbital currents, show occurrence can be traced...
At a certain ``magic'' relative twist angle of two graphene sheets it remains challenge to obtain detailed description the proliferation correlated topological electronic phases and their filling dependence. We perform self-consistent real-space Hartree-Fock study an effective moir\'e lattice model map out preferred ordered as function Coulomb interaction strength flat-band factor. It is found that quantum valley Hall phase, previously discovered at charge neutrality, present all integer...
At a certain "magic" relative twist angle of two graphene sheets it remains challenge to obtain detailed description the proliferation correlated topological electronic phases and their filling-dependence. We perform self-consistent real-space Hartree-Fock study an effective moir{é} lattice model map out preferred ordered as function Coulomb interaction strength flat-band filling factor. It is found that quantum valley Hall phase, previously discovered at charge neutrality, present all...
Spontaneous generation of time-reversal symmetry breaking in unconventional superconductors is currently a topic considerable interest. While chiral superconducting order often assumed to be the source such signatures, they can sometimes also arise from nonmagnetic disorder. Here we perform theoretical study impact dislocations on parameter within microscopic one-band model which, homogeneous case, features either extended $s$-wave, $d$-wave, or $s+id$-wave superconductivity depending...