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Evidence for Time-Reversal-Symmetry-Broken Superconductivity in Locally Noncentrosymmetric SrPtAs
P. K. Biswas, H. Luetkens, T. Neupert +16
We report the magnetic and superconducting properties of locally noncentrosymmetric SrPtAs obtained by muon-spin-rotation/relaxation (muSR) measurements. Zero-field muSR reveals th…
Enhancing the stability of a fractional Chern insulator against competing phases
Adolfo G. Grushin, Titus Neupert, Claudio Chamon +1
We construct a two-band lattice model whose bands can carry the Chern numbers C=0,pm1,pm2. By means of numerical exact diagonalization, we show that the most favorable situation th…
Elementary formula for the Hall conductivity of interacting systems
Titus Neupert, Luiz Santos, Claudio Chamon +1
A formula for the Hall conductivity of interacting electrons is given under the assumption that the ground state manifold is N_gs-fold degenerate and discrete translation symmetry…
Surface and bulk Fermiology and band dispersion in non-centrosymmetric BiTeI
Gabriel Landolt, Sergey V. Eremeev, Yury M. Koroteev +11
BiTeI has a layered and non-centrosymmetric structure where strong spin-orbit interaction leads to a giant spin splitting in the bulk bands. Here we present high-resolution angle-r…
Noncommutative geometry for three-dimensional topological insulators
Titus Neupert, Luiz Santos, Shinsei Ryu +2
We generalize the noncommutative relations obeyed by the guiding centers in the two-dimensional quantum Hall effect to those obeyed by the projected position operators in three-dim…