Spatially resolved relaxation dynamics of photoinduced quasiparticles in underdopedYBa2Cu3O7−δ

Unveiling the hidden nematicity and spin subsystem in FeSe

“…In the literature, this difference is known to manifest the nematicity of the electronic structure. For example, the anisotropic single-particle and collective excitations in the quasi-1D charge-density wave semiconductor K 0.3 MoO 3 37 and the d-wave symmetry of the superconducting gap in cuprate superconductors YBCO [38][39][40][41] have been unambiguously revealed by polarized pump-probe spectroscopy. As intriguingly, the orientation anisotropy is shown also in τ 1 (Fig.…”

“…ΔR/R(t, pump, probe) curves along various orientations on the surface of the sample were obtained on rotating the polarization of pulses at nearly normal incidence (pump ~ 0°, probe ~ 7°). The intensity and polarization (electric field, E) of pulses were adjusted with a λ/2 plate and polarizer [38][39][40][41] . Moreover, the penetration depth of FeSe is ~ 24 nm for 400 nm and ~30 nm for 800 nm, which are estimated from the skin depth of electromagnetic wave in metal, λ/4k 11 .…”

“…The intensity and polarization (electric field, E) of pulses were adjusted with a λ/2 plate and polarizer. [38][39][40][41] Moreover, the penetration depth of FeSe is~24 nm for 400 nm and~30 nm for 800 nm, which are estimated from the skin depth of electromagnetic wave in metal, λ/4πk.…”

Ultrafast spectroscopy of quasiparticle dynamics in cuprate superconductors

“…conducted a polarization-dependent ultrafast study on YBCO crystals [87]. They found that the QP relaxation is polarization dependent and the bottleneck relaxation process is strongly anisotropic in superconducting states when interpreted as a signature of d-wave gap symmetry.…”

Doping dependence of the ultrafast electronic dynamics ofY1−xPrxBa2Cu3Luo1, Lo2, Su3 et al. 2010Phys. Rev. BSelf Cite7090View full textAdd to dashboardCite

“…In the case of YBa 2 Cu 3 O 7−␦ , the amplitude of the positive component in ⌬R / R rises dramatically near T c , suggesting the opening of the superconducting gap. [7][8][9][10][11][12] Earlier works have overlooked the significant change in the rather small and negative component that occurs well above T c . For comparison, the temperature T N ͓marked by an arrow in Fig.…”