Ultrafast photoinduced reflectivity transients in ( Nd 0 . 5 Sr 0 . 5

Ju n 20 07 Anomalous First Order Transition in Nd 0 . 5 Sr 0 . 5 MnO 3 : An interplay between kinetic arrest and thermodynamic transitions

Provenance of lithogenic surface sediments and pathways of riverine suspended matter in the Eastern Mediterranean Sea: evidence from Nd/Nd and Sr/Sr ratios

In order to characterize the provenance of lithogenic surface sediments from the Eastern Mediterranean Sea (EMS), residual (leached) fraction of 34 surface samples have been analysed for their Nd/Nd and Sr/Sr isotope ratios. The sample locations bracket all important entrances of riverine suspended matter into the EMS as well as all sub-basins of the EMS. The combined analyses of these two isot...

Ultrafast photoinduced phase separation dynamics in Pr0.6Ca0.4MnO3 thin films

The time resolved Magnetooptical Kerr effect in the substrate-strain-induced insulating ferromagnetic phase in (Pr0.6Ca0.4)MnO3 thin films on two different substrates was measured in a magnetic field up to 1.1T. The photoinduced Kerr rotation and ellipticity show remarkably different magnetic-field dependence. From the comparison of the magnetic field dependencies of the photoinduced and static...

Relationship between myoplasmic calcium transients and calcium currents in frog skeletal muscle

Ca2+ currents (ICa) and myoplasmic Ca2+ transients were simultaneously recorded in single muscle fibers from the semitendinosus muscle of Rana pipiens. The vaseline-gap voltage-clamp technique was used. Ca2+ transients were recorded with the metallochromic indicator dye antipyrylazo III. Ca2+ transients consisted of an early fast rising phase followed by a late slower one. The second phase was ...

Ultrafast optical nonlinearity in quasi - one - dimensional Mott - insulator Sr 2 CuO 3

We report strong instantaneous photoinduced absorption in the quasi-one-dimensional Mott insulator Sr 2 CuO 3 in the IR spectral region. The observed photoinduced absorption is to an even-parity two-photon state that occurs immediately above the absorption edge. Theoretical calculation based on a two-band extended Hubbard model explains the experimental features and indicates that the strong tw...