Transient terahertz photoconductivity of insulating cuprates

Abstract

We establish a detailed phenomenology of photocarrier transport in the copper oxide plane by studying the transient terahertz photoconductivity of Sr${}_2$CuO${}_2$Cl${}_2$ and YBa${}_2$Cu${}_3$O${}_6$. The peak photoconductivity saturates with fluence, decays on multiple picosecond timescales, and evolves into a state characterized by activated transport. The time dependence shows little change with fluence, indicating that the decay is governed by first-order recombination kinetics. We find that most photocarriers make a negligible contribution to the dc photoconductivity, and we estimate the intrinsic photocarrier mobility to be 0.6-0.7 cm${}^2$/V s at early times, comparable to the mobility in chemically doped materials.

References in corpus (12)

• Electrodynamics of Correlated Electron Materials
• Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
• A global inversion-symmetry-broken phase inside the pseudogap region of YBa${}_2$Cu${}_3$O${}_y$
• Photo-induced states in a Mott insulator
• Charge dynamics of doped holes in high Tc cuprates - A clue from optical conductivity
• Witnessing the formation and relaxation of massive quasi-particles in a strongly correlated electron system
• Nonequilibrium quantum dynamics of a charge carrier doped into a Mott insulator
• Role of impact ionization in the thermalization of photo-excited Mott insulators
• Charge Recombination in Undoped Cuprates
• Charge-transfer exciton in La2CuO4 probed with resonant inelastic x-ray scattering
• Coupling-dependent rates of energy transfers from photoexcited Mott insulators to lattice vibrations
• Transient terahertz spectroscopy of excitons and unbound carriers in quasi two-dimensional electron-hole gases

Cited by in corpus (5)

• A quantum Boltzmann equation for strongly correlated electrons
• Optical Saturation Produces Spurious Evidence for Photoinduced Superconductivity in K${}_3$C${}_{60}$
• A photo-induced strange metal with electron and hole quasi-particles
• Many-body recombination in insulating cuprates
• Approximations used in the analysis of signals in pump-probe spectroscopy