Johnson, S. L.Beaud, P.Milne, C. J.Krasniqi, F. S.Zijlstra, E. S.Garcia, M. E.Kaiser, M.Grolimund, D.Abela, R.Ingold, G.2010-11-302010-11-302010-11-30200810.1103/PhysRevLett.100.155501https://infoscience.epfl.ch/handle/20.500.14299/61450WOS:000255117800036We employ grazing-incidence femtosecond x-ray diffraction to characterize the coherent, femtosecond laser-induced lattice motion of a bismuth crystal as a function of depth from the surface with a temporal resolution of 193 +/- 8 fs. The data show direct consequences on the lattice motion from carrier diffusion and electron-hole interaction, allowing us to estimate an effective diffusion rate of D=2.3 +/- 0.3 cm(2)/s for the highly excited carriers and an electron-hole interaction time of 260 +/- 20 fs.PhononsExcitationAntimonyPulsestext::journal::journal article::research article