Université de Fribourg

Microscopic gauge-invariant theory of the c-axis infrared response of bilayer cuprate superconductors and the origin of the superconductivity-induced absorption bands

Chaloupka, Jiří ; Bernhard, Christian ; Munzar, Dominik

In: Physical Review B, 2009, vol. 79, no. 18, p. 184513

We report on results of our theoretical study of the c-axis infrared conductivity of bilayer high-Tc cuprate superconductors using a microscopic model involving the bilayer-split (bonding and antibonding) bands. An emphasis is on the gauge invariance of the theory, which turns out to be essential for the physical understanding of the electrodynamics of these...