1.

Evidence for carrier localization in the pseudogap state of cuprate superconductors from coherent quench experiments

In this article we have studied nonequilibrium phase transition into the pseudogap state. The three-pulse experiments have revealed short correlation range of the dynamical state and individual character of the quasiparticle relaxation. Energy required for nonthermal destruction of the pseudogap scales linearly with the gap. This is explained with the model which accounts for subgap phonons generation.

COBISS.SI-ID: 28758311

2.

Time-resolved polarimetry for photoexcited QP dynamics in Bi2212

The dynamics of quasi-particle (QP) excitations with different symmetry is investigated in the superconducting (SC) and pseudogap (PG) states of the high-temperature superconductor Bi2Sr2CaCu2O8+d(Bi2212) using a polarization-sensitive optical pump-probe measurement. The observation of distinct anisotropies for SC excitations and for PG excitations by the probe beam polarization and absence of any dependence on the pump beam polarization evidence the existence of a spontaneous spatial symmetry breaking in the PG state

COBISS.SI-ID: 29112103