711 citations · 5.5k across the 188 of their papers we have counts for
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Secondary Collective Excitations in Intermediate to Strong-Coupling Superconductors
Joshua Althüser, Götz S. Uhrig
Considering systematically derived energy-transfer-dependent effective electron-electron interactions leads to the appearance of secondary phase and amplitude modes in isotropic su…
Enhanced Superconductivity in Proximity to Peaks in Densities of States
Joshua Althüser, Ilya M. Eremin, Götz S. Uhrig
For the BCS theory of superconductivity, the electron-phonon interaction is transformed to an attractive electron-electron interaction in the vicinity of the Fermi energy only. At…
Experimental signature of transient symmetry breaking in a cavity superconductor
Siyu Duan, Jingbo Wu, Xiaoqing Jia +5
Transient states of matter far from equilibrium may exhibit physical properties beyond those allowed by the equilibrium-state crystalline symmetries. We explore ultrafast and direc…
Collective modes in superconductors including Coulomb repulsion
Joshua Althüser, Götz S. Uhrig
We numerically study the collective excitations present in isotropic superconductors including a screened Coulomb interaction. By varying the screening strength, we analyze its imp…
Optical Pumping of Bardeen-Cooper-Schrieffer Superconductors
Vanessa Sulaiman, Götz S. Uhrig
Motivated by the generation by optical pulses of non-thermal distributions of nuclear spins in quantum dots we investigate the effect of optical pulses applied to Bardeen-Cooper-Sc…
Topological superconductivity induced by a triple-Q magnetic structure
Jasmin Bedow, Eric Mascot, Thore Posske +4
We demonstrate that the recently discovered triple-Q (3Q) magnetic structure, when embedded in a magnet-superconductor hybrid (MSH) system, gives rise to the emergence of topologic…
Coupling of Higgs and Leggett modes in nonequilibrium superconductors
H. Krull, N. Bittner, G. S. Uhrig +2
Collective excitation modes are a characteristic feature of symmetry-broken phases of matter. For example, superconductors exhibit an amplitude Higgs mode and a phase mode, which a…
Signatures of nonadiabatic BCS state dynamics in pump-probe conductivity
H. Krull, D. Manske, G. S. Uhrig +1
We theoretically study the pump-probe response of nonequilibrium BCS superconductors coupled to optical phonons. For ultrashort pump pulses a nonadiabatic regime emerges, which is…
Effects of ring exchange interaction on the Neel phase of two-dimensional, spatially anisotropic, frustrated Heisenberg quantum antiferromagnet
Kingshuk Majumdar, Douglas Furton, Goetz S. Uhrig
Higher order quantum effects on the magnetic phase diagram induced by four-spin ring exchange on plaquettes are investigated for a two-dimensional quantum antiferromagnet with S=1/…
Self-consistent spin-wave theory for a frustrated Heisenberg model with biquadratic exchange in the columnar phase and its application to iron pnictides
Daniel Stanek, Oleg P. Sushkov, Götz S. Uhrig
Recent neutron scattering studies revealed the three dimensional character of the magnetism in the iron pnictides and a strong anisotropy between the exchange perpendicular and par…
Three dimensional generalization of the - Heisenberg model on a square lattice and role of the interlayer coupling
Michael Holt, Oleg P. Sushkov, Daniel Stanek +1
A possibility to describe magnetism in the iron pnictide parent compounds in terms of the two-dimensional frustrated Heisenberg - model has been actively discussed recent…
Magnetic Excitations in Bilayer High-Temperature Superconductors with Stripe Correlations
G. S. Uhrig, K. P. Schmidt, M. Grüninger
The universal behaviour of the magnetic excitations in high-temperature superconductors is described in a model with static stripes retaining only the localized spin degrees of fre…
Magnetic excitations in the stripe phase of high-T_c superconductors
G. S. Uhrig, K. P. Schmidt, M. Grüninger
The magnetic excitations in the stripe phase of high-T_c superconductors are investigated in a model of spin ladders which are effectively coupled via charged stripes. Starting fro…
Unifying Magnons and Triplons in Stripe-Ordered Cuprate Superconductors
G. S. Uhrig, K. P. Schmidt, M. Grüninger
Based on a two-dimensional model of coupled two-leg spin ladders, we derive a unified picture of recent neutron scattering data of stripe-ordered La_(15/8)Ba_(1/8)CuO_4, namely of…