Surface Carrier Dynamics on Semiconductor Studied with Femtosecond Core-Level Photoelectron Spectroscopy Using Extreme Ultraviolet High-Order Harmonic SourceK. Oguri, T. Tsunoi, K. Kato, H. Nakano, T. Nishikawa, H. Gotoh, K. Tateno and T. SogawaEPJ Web of Conferences, 41 (2013) 04017DOI: https://doi.org/10.1051/epjconf/20134104017