Photoinduced phase transitions in strongly correlated electron systems

Author

Koshihara, Shin-ya ; Adachi, Shinichi ; Okimoto, Yoichi ; Ishikawa, Tadahiko ; Fukaya, Ryo ; Fukumoto, Keiki ; Hoshino, Manabu ; Onda, Ken

Author_Institution

Dept. of Mater. Sci., Tokyo Inst. of Technol., Tokyo, Japan

fYear

2012

Firstpage

1

Lastpage

2

Abstract

The search for materials that show a phase transition triggered by weak external stimulation of light is an important and attractive target for photonic and materials science today. My talk reviews experimental evidence indicating that photo-injected local excitation can really trigger an electron-lattice coupled cooperative phenomenon named as photo-induced phase transition (PIPT: Photo-domino effect) in wide class of materials based on the dynamical x-ray technique combined with the ultrafast spectroscopy. Obtained results also demonstrate that `hidden phase´ in strongly correlated systems which never appears in the phase diagram under thermo-equilibrium condition plays an essential role for the gigantic photo-response of the strongly correlated electron systems.

Keywords

X-ray diffraction; high-speed optical techniques; neodymium compounds; phase diagrams; solid-state phase transformations; strongly correlated electron systems; strontium compounds; thermodynamics; thin films; Nd_0.5Sr_0.5MnO₃; dynamical X-ray technique; electron-lattice coupled cooperative phenomenon; hidden phase; materials science; phase diagram; photodomino effect; photoinduced phase transition; photoinjected local excitation; photonic science; strongly correlated electron systems; thermoequilibrium condition; thin film; ultrafast spectroscopy; weak external light stimulation; Lattices; Optical diffraction; Optical films; Optical sensors; Optical variables control; Ultrafast optics;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics (CLEO), 2012 Conference on

Conference_Location

San Jose, CA

Print_ISBN

978-1-4673-1839-6

Type

conf

Filename

6326956