Publication details

Self-consistent gauge-invariant theory of the in-plane infrared response of high-Tc cuprate superconductors



Year of publication 2007
Type Article in Periodical
Magazine / Source Physical Review B
MU Faculty or unit

Faculty of Science

Field Solid matter physics and magnetism
Keywords cuprate superconductors; optical response; spin-fermion model; vertex corrections; gauge-invariance
Description We report on results of our theoretical study of the in-plane infrared conductivity of the high-Tc cuprate superconductors using the model where charged planar quasiparticles are coupled to spin fluctuations. The computations include both the renormalization of the quasiparticles and the corresponding modification of the current-current vertex function (vertex correction), which ensures gauge invariance of the theory and local charge conservation in the system.
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