The Fluctuation Induced Pseudogap in the Infrared Optical Conductivity of High Temperature Superconductors

Abstract

We study the effect of fluctuations on the {\bf ac} conductivity of a layered superconductor both for $c$-axis and $ab$-plane electromagnetic wave polarizations. The fluctuation contributions of different physical nature and signs (paraconductivity, Maki-Thompson anomalous contribution, one-electron density of states renormalization) are found to be suppressed by the external field at different characterisitic frequencies (${\omega }_{\mathrm{AL}}\sim T-T_{\mathrm{c}}$, ${\omega }_{\mathrm{MT}}\sim \max \{T-T_{\mathrm{c}},{\tau }_{\phi }^{-1}\}$, ${\omega }_{\mathrm{DOS}}\sim \min \{T,{\tau }^{-1}\}$ for the $2D$ case). As a result the appearance of the nonmonotonic frequency dependence (pseudogap) in the infrared optical conductivity of HTS film is predicted. The effect has to be especially pronounced in the case of the electromagnetic field polarization along $c$-axis.

arXiv comment8 pages, 4 eps figures, Submitted to Phys. Rev. B

Cited by in corpus (8)

• Ultrafast dynamics of fluctuations in high-temperature superconductors far from equilibrium
• Quench dynamics of superconducting fluctuations and optical conductivity in a disordered system
• The pseudogap state in superconductors: Extended Hartree approach to time-dependent Ginzburg-Landau Theory
• Superconducting Fluctuation Corrections to the Thermal Current in Granular Metals
• The Pseudogap Challenge: Understanding the ab-Plane AC Conductivity below Tc
• Short Wavelength Cutoff Effects in the AC Fluctuation Conductivity of Superconductors
• Pairing Fluctuation AC Conductivity of Disordered Thin Films
• Weak localization correction to linear absorption in conventional superconductors