The influence of charge and magnetic order on polaron and acoustic phonon dynamics in LuFe₂O₄

Authors

J. Lee, Los Alamos National LaboratoryFollow
S. A. Trugman, Los Alamos National Laboratory
C. L. Zhang, Rutgers University
D. Talbayev, Tulane University of Louisiana
Xiaoshan Xu, University of Nebraska-LincolnFollow
S.-W. Cheong, Rutgers University - New Brunswick/Piscataway
D. A. Yarotski, Los Alamos National Laboratory
A. J. Taylor, Los Alamos National Laboratory
R. P. Prasankumar, Los Alamos National LaboratoryFollow

Date of this Version

2015

Citation

APPLIED PHYSICS LETTERS 107, 042906 (2015)

Comments

US govt work

Abstract

Femtosecond optical pump-probe spectroscopy is used to reveal the influence of charge and magnetic order on polaron dynamics and coherent acoustic phonon oscillations in single crystals of charge-ordered, ferrimagnetic LuFe₂O₄. We experimentally observed the influence of magnetic order on polaron dynamics. We also observed a correlation between charge order and the amplitude of the acoustic phonon oscillations, due to photoinduced changes in the lattice constant that originate from the photoexcited electrons. This provides insight into the general behavior of coherent acoustic phonon oscillations in charge-ordered materials.