214 citations · 572 across the 9 of their papers we have counts for
9 papers
Tunneling spectroscopy for probing orbital anisotropy in iron pnictides
N. Plonka, A. F. Kemper, S. Graser +2
Using realistic multi-orbital tight-binding Hamiltonians and the T-matrix formalism, we explore the effects of a non-magnetic impurity on the local density of states in Fe-based co…
Modulations of the local pairing interaction near magnetic impurities in d-wave superconductors
A. T. Roemer, S. Graser, P. J. Hirschfeld +1
The spin-fluctuation based pairing mechanism has proven successful in explaining the pairing symmetries due to Fermi surface nesting of both cuprates and iron-based materials. In t…
Correlation and disorder-enhanced nematic spin response in superconductors with weakly broken rotational symmetry
Brian M. Andersen, Siegfried Graser, P. J. Hirschfeld
Recent experimental and theoretical studies have highlighted the possible role of a electronic nematic liquid in underdoped cuprate superconductors. We calculate, within a model of…
Volovik effect in a highly anisotropic multiband superconductor: experiment and theory
Y. Wang, J. S. Kim, G. R. Stewart +7
We present measurements of the specific heat coefficient γ(= C/T) in the low temperature limit as a function of an applied magnetic field for the Fe-based superconductor BaFe(A…
Modeling of Superconducting Stripe Phases in High-Tc Cuprates
Florian Loder, Siegfried Graser, Markus Schmid +2
Even before the experimental discovery of spin- and charge-stripe order in LaNdSrCuO and LaBaCuO at x = 1/8, stripe formation was predicted fr…
Supercurrent through grain boundaries in the presence of strong correlations
F. A. Wolf, S. Graser, F. Loder +1
Strong correlations are known to severely reduce the mobility of charge carriers near half-filling and thus have an important influence on the current carrying properties of grain…
Sensitivity of the superconducting state and magnetic susceptibility to key aspects of electronic structure in ferropnictides
A. F. Kemper, T. A. Maier, S. Graser +3
Experiments on the iron-pnictide superconductors appear to show some materials where the ground state is fully gapped, and others where low-energy excitations dominate, possibly in…
Spin fluctuations and superconductivity in a 3D tight-binding model for BaFe2As2
S. Graser, A. F. Kemper, T. A. Maier +3
Despite the wealth of experimental data on the Fe-pnictide compounds of the KFe2As2-type, K = Ba, Ca, or Sr, the main theoretical work based on multiorbital tight-binding models ha…
Origin of Gap Anisotropy in Spin Fluctuation Models of the Fe-pnictides
T. A. Maier, S. Graser, D. J. Scalapino +1
We discuss the large gap anisotropy found for the A1g (s-wave) state in RPA spin-fluctuation and functional renormalization group calculations and show how the simple arguments lea…