136 citations · 243 across the 3 of their papers we have counts for
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cond-mat.mtrl-sci2010★ 136 cited
Ultrafast carrier and phonon dynamics in Bi2Se3 crystals
J. Qi, X. Chen, W. Yu +9
Ultrafast time-resolved differential reflectivity of Bi2Se3 crystals is studied using optical pump-probe spectroscopy. Three distinct relaxation processes are found to contribute t…
cond-mat.mtrl-sci2007★ 50 cited
Coherent Magnetization Precession in GaMnAs induced by Ultrafast Optical Excitation
J. Qi, Y. Xu, N. Tolk +3
We use femtosecond optical pulses to induce, control and monitor magnetization precession in ferromagnetic Ga0.965Mn0.035As. At temperatures below ~40 K we observe coherent oscilla…