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Interacting surface states of three-dimensional topological insulators
T. Neupert, S. Rachel, R. Thomale +1
We numerically investigate the surface states of a strong topological insulator in the presence of strong electron-electron interactions. We choose a spherical topological insulato…
Fractional (Chern and topological) insulators
Titus Neupert, Claudio Chamon, Thomas Iadecola +2
We review various features of interacting Abelian topological phases of matter in two spatial dimensions, placing particular emphasis on fractional Chern insulators (FCIs) and frac…
Möbius molecules and fragile Mott insulators
Lukas Muechler, Joseph Maciejko, Titus Neupert +1
Motivated by the concept of Möbius aromatics in organic chemistry, we extend the recently introduced concept of fragile Mott insulators (FMI) to ring-shaped molecules with repulsiv…
Topological BF theory of the quantum hydrodynamics of incompressible polar fluids
Apoorv Tiwari, Xiao Chen, Titus Neupert +4
We analyze a hydrodynamical model of a polar fluid in (3+1)-dimensional spacetime. We explore a spacetime symmetry -- volume preserving diffeomorphisms -- to construct an effective…
Accessing topological order in fractionalized liquids with gapped edges
Thomas Iadecola, Titus Neupert, Claudio Chamon +1
We consider manifestations of topological order in time-reversal-symmetric fractional topological liquids (TRS-FTLs), defined on planar surfaces with holes. We derive a formula for…
The single-mode approximation for fractional Chern insulators and the fractional quantum Hall effect on the torus
C. Repellin, T. Neupert, Z. Papic +1
We analyze the collective magneto-roton excitations of bosonic Laughlin fractional quantum Hall (FQH) states on the torus and of their analog on the lattice, the fractional…