333 citations · 3.5k across the 62 of their papers we have counts for
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Topological invariants for the Haldane phase of interacting SSH chains -- a functional RG approach
Björn Sbierski, Christoph Karrasch
We present a functional renormalization group approach to interacting topological Green function invariants with a focus on the nature of transitions. The method is applied to chir…
Second order functional renormalization group approach to one-dimensional systems in real and momentum space
Björn Sbierski, Christoph Karrasch
We devise a functional renormalization group treatment for a chain of interacting spinless fermions which is correct up to second order in the interaction strength. We treat both i…
Quantitative analytical theory for disordered nodal points [Article and Erratum]
Björn Sbierski, Kevin A. Madsen, Piet W. Brouwer +1
Disorder effects are especially pronounced around nodal points in linearly dispersing bandstructures as present in graphene or Weyl semimetals. Despite the enormous experimental an…
Probing electron-electron interaction in quantum Hall systems with scanning tunneling spectroscopy
S. Becker, C. Karrasch, T. Mashoff +4
Using low-temperature scanning tunneling spectroscopy applied to the Cs-induced two-dimensional electron system (2DES) on p-type InSb(110), we probe electron-electron interaction e…
Non-equilibrium current and relaxation dynamics of a charge-fluctuating quantum dot
C. Karrasch, S. Andergassen, M. Pletyukhov +4
We study the steady-state current in a minimal model for a quantum dot dominated by charge fluctuations and analytically describe the time evolution into this state. The current is…
A quantum criticality perspective on the charging of narrow quantum-dot levels
V. Kashcheyevs, C. Karrasch, T. Hecht +3
Understanding the charging of exceptionally narrow levels in quantum dots in the presence of interactions remains a challenge within mesoscopic physics. We address this fundamental…