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Multigap superconductivity in locally non-centrosymmetric SrPtAs: An As nuclear quadrupole resonance investigation
F. Brückner, R. Sarkar, M. Günther +9
We report detailed As-NQR investigations of the locally non-centrosymmetric superconductor SrPtAs. The spin-lattice relaxation studies prove weakly coupled multi-gap superco…
Topological gaps without masses in driven graphene-like systems
Thomas Iadecola, Titus Neupert, Claudio Chamon
We illustrate the possibility of realizing band gaps in graphene-like systems that fall outside the existing classification of gapped Dirac Hamiltonians in terms of masses. As our…
Chiral -wave Superconductivity in SrPtAs
Mark H. Fischer, Titus Neupert, Christian Platt +5
Recent SR measurements on SrPtAs revealed time-reversal-symmetry breaking with the onset of superconductivity [Biswas et al., Phys. Rev. B 87, 180503(R) (2013)], suggesting an u…
Fractional Chern insulators with strong interactions far exceeding bandgaps
Stefanos Kourtis, Titus Neupert, Claudio Chamon +1
We study two models for spinless fermions featuring topologically non-trivial bands characterized by Chern numbers at fractional filling. Using exact diagonalization, we s…
Floquet Fractional Chern Insulator in Doped Graphene
Adolfo G. Grushin, Álvaro Gómez-León, Titus Neupert
Fractional Chern insulators are theoretically predicted states of electronic matter with emergent topological order. They exhibit the same universal properties as the fractional qu…
Interaction driven phases in the honeycomb lattice from exact diagonalization
Noel A. García-Martínez, Adolfo G. Grushin, Titus Neupert +2
We investigate the fate of interaction driven phases in the half-filled honeycomb lattice for finite systems via exact diagonalization with nearest and next nearest neighbour inter…