66 citations · 165 across the 9 of their papers we have counts for
5 papers · 1 filter
A search for correlation-induced adiabatic paths between distinct topological insulators
Johannes S. Hofmann, Fakher F. Assaad, Raquel Queiroz +1
Correlations in topological states of matter provide a rich phenomenology, including a reduction in the topological classification of the interacting system compared to its non-int…
Probing embedded topological modes in bulk-like GeTe-SbTe heterostructures
Hisao Nakamura, Johannes Hofmann, Nobuki Inoue +5
The interface between topological and normal insulators hosts metallic states that appear due to the change in band topology. While these topological states at a surface, i.e., a t…
Superconductivity, pseudogap, and phase separation in topological flat bands: a quantum Monte Carlo study
Johannes S. Hofmann, Erez Berg, Debanjan Chowdhury
We study a two-dimensional model of an isolated narrow topological band at partial filling with local attractive interactions. Numerically exact quantum Monte Carlo calculations sh…
High-temperature expansion of the viscosity in interacting quantum gases
Johannes Hofmann
We compute the frequency-dependent shear and bulk viscosity spectral functions of an interacting Fermi gas in a quantum virial expansion up to second quadratic order in the fugacit…
Quantum oscillations in Dirac magnetoplasmons
Johannes Hofmann
The plasmon frequency in standard electron gases with a parabolic single-particle dispersion is a purely classical quantity that is not sensitive to electron interactions or the eq…