Title :
Coherent optical and acoustic phonons coupled with the charge-ordering phase transition in La1/4Pr3/8Ca3/8MnO3
Author :
Jang, Kyeong-Jin ; Lim, Jongseok ; Kim, Jihee ; Yee, Ki-Ju ; Ahn, Jaewook ; Jaewook Ahn
Author_Institution :
Dept. of Phys., KAIST, Daejeon, South Korea
Abstract :
Ultrafast pump-probe spectroscopy is used to investigate La1/4Pr3/8Ca3/8MnO3. Coherent optical and acoustic phonons are observed strongly coupled with the charge-ordering phase transition. Phonon characteristics are well understood in a hypothesis related with charge-ordering gap opening.
Keywords :
calcium compounds; high-speed optical techniques; lanthanum compounds; phonons; praseodymium compounds; La0.25Pr0.375Ca0.375MnO3; acoustic phonons; charge-ordering gap opening; charge-ordering phase transition; coherent optical phonons; ultrafast pump-probe spectroscopy; Electron optics; Laser excitation; Magnetic materials; Optical coupling; Optical pumping; Optical scattering; Phonons; Spectroscopy; Temperature dependence; Ultrafast optics; (160.5690) Rare-earth-doped materials; (320.7150) Ultrafast spectroscopy;
Conference_Titel :
Lasers and Electro-Optics, 2009 and 2009 Conference on Quantum electronics and Laser Science Conference. CLEO/QELS 2009. Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-55752-869-8
Electronic_ISBN :
978-1-55752-869-8
