Christian Platt

Competing many-body instabilities and unconventional superconductivity in graphene

The band structure of graphene exhibits van Hove singularities (VHSs) at dopings

Exotic d-Wave Superconducting State of Strongly Hole-Doped KxBa1-xFe2As2

x=\ifmmode\pm\else\textpm\fi{}1/8

Functional renormalization group for multi-orbital Fermi surface instabilities

away from the Dirac point. Near the VHS, interactions effects, enhanced due to the large density of states, can give rise to various many-body phases. We study the competition between many-body instabilities in graphene using the functional renormalization group. We predict a rich phase diagram, which, depending on band structure as well as the range and scale of Coulomb interactions, contains a

Theory of superconductivity in a three-orbital model of Sr2RuO4

d+id

Mechanism for a pairing state with time-reversal symmetry breaking in iron-based superconductors

-wave superconducting (SC) phase, or a spin-density-wave phase at the VHS. The

Chiral d-wave superconductivity in SrPtAs

d+id

Pairing in the iron arsenides: a functional RG treatment

state is expected to exhibit quantized charge and spin Hall response, as well as Majorana modes bound to vortices. Nearby the VHS, we find singlet

Model evidence of an anisotropic chiral d+id-wave pairing state for the water-intercalated Na(x)CoO2·yH2O superconductor.

d+id

Phase diagram of the Hubbard model on the anisotropic triangular lattice

-wave and triplet

Functional renormalization group study of an eight-band model for the iron arsenides

f