Title :
Ultrafast phase-transition induced by selective vibrational excitation in a magnetoresistive manganite
Author :
Rini, M. ; Tobey, R. ; Wall, S. ; Dean, N. ; Itatani, J. ; Tomioka, Y. ; Tokura, Y. ; Schoenlein, R.W. ; Cavalleri, A.
Author_Institution :
Lawrence Berkeley Nat. Lab., Berkeley, CA
Abstract :
We show that selective excitation of a phonon mode induces an insulator-metal phase transition in a magnetoresistive manganite. The dynamics of such phase transformation are studied by optical pump-probe, transport and X-ray absorption measurements.
Keywords :
X-ray absorption; calcium compounds; high-speed optical techniques; infrared spectra; magnetoresistance; metal-insulator transition; optical pumping; phonons; praseodymium compounds; Pr0.7Ca0.3MnO3; X-ray absorption; infrared absorption spectrum; insulator-metal phase transition; optical pump probe; phase transformation dynamics; phonon mode; selective vibrational excitation; ultrafast phase transition; Colossal magnetoresistance; Conductivity; Electromagnetic wave absorption; Electrons; Insulation; Optical distortion; Optical pumping; Resonance; Ultrafast optics; Vibration measurement; (160.3820) Magneto-optical materials; (320.7130) Ultrafast processes in condensed matter, including semiconductors; (320.7150) Ultrafast spectroscopy;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
