Unconventional optical responses have been revealed for the perovskite manganese oxide, Pr1-xCaxMnO3, which is known to undergo the insulator-metal (I-M) transition relevant to the magnetic field induced melting of the charge-ordered (CO) state. Optical conductivity spectrum is drastically modified over 0-1 eV from a gap-like feature into a metallic band with application of magnetic field of 7 T. It was found that such an I-M transition can be caused by photo-excitation as well. The electrical conductivity and magnetization increase abruptly with irradiation of visible/IR laser, indicating the photo-melting of the CO state and the photo-generation of ferromagnetic metallic domains.
|Journal||Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals|
|Publication status||Published - 1998|
|Event||Proceedings of the 1997 8th Sympoisum on Unconventional Photoactive Systems (UPS) - Nara, Jpn|
Duration: 1997 May 25 → 1997 May 29
ASJC Scopus subject areas
- Condensed Matter Physics