Journal
PHYSICAL REVIEW LETTERS
Volume 87, Issue 22, Pages art. no.-225701Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.87.225701
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Time-resolved x-ray diffraction with ultrashort (approximate to 300 fs), multi-keV x-ray pulses has been used to study the femtosecond laser-induced solid-to-liquid phase transition in a thin crystalline layer of germanium. Nonthermal melting is observed to take place within 300-500 fs. Following ultrafast melting we observe strong acoustic perturbations evolving on a picosecond time scale.
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