Ultrafast insulator-metal transition induced in a manganite by stretching of a metal-oxygen bond with THz pulses
Optics InfoBase Conference Papers (2007)
Abstract:
The magnetoresistive manganite Pr0.7Ca0.3MnO3 becomes metallic when THz pulses are used to resonantly drive a stretching Mn-O vibration. A five-order-of-magnitude drop of the sample resistivity and ultrafast, nanosecond-lived reflectivity changes are observed. © 2007 Optical Society of America.Enhanced photosuseeptibility in the insulatorto-metal phase transition in vanadium dioxide
SPRINGER SERIES CHEM 88 (2007) 600-602
Abstract:
We use optical-pump terahertz-probe spectroscopy to measure the photoinduced phase transition in vanadium dioxide thin films. Our measurements reveal a fluence threshold needed to drive this transition that decreases with increasing temperature.Insulator-to-metal transition induced by mid-IR vibrational excitation in a magnetoresistive manganite
SPRINGER SERIES CHEM 88 (2007) 588-590
Abstract:
Selective vibrational excitation of insulating Pr0.7Ca0.3MnO3 at 17 mu m triggers a transition to a metallic state. A four order of magnitude drop of the sample resistivity and ultrafast, nanosecond-lived reflectivity changes are observed.Lattice motions from THz phonon polaritons measured with femtosecond X-ray diffraction
SPRINGER SERIES CHEM 88 (2007) 716-718
Abstract:
We use femtosecond x-ray diffraction to measure the coherent lattice displacements associated with the excitation and propagation of THz phonon polaritons in LiTaO3.Ultrafast Gigantic Photo-Response in Organic Salt (EDO-TTF)2PF6 Initiated by 20-fs Laser Pulses
Optica Publishing Group (2007) fwa2