The influence of charge and magnetic order on polaron and acoustic phonon dynamics in LuFe ₂ O ₄

Journal Article · Mon Jul 27 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4927739· OSTI ID:1204688

Lee, J.; Trugman, S. A.; Zhang, C. L.; Talbayev, D.; Xu, X. S.; Cheong, S. -W.; Yarotski, D. A.; Taylor, A. J.; Prasankumar, R. P.

Femtosecond optical pump-probe spectroscopy is used to reveal the influence of charge and magnetic order on polarondynamics and coherent acoustic phonon oscillations in single crystals of charge-ordered, ferrimagnetic LuFe₂O₄. We experimentally observed the influence of magnetic order on polarondynamics. 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. As a result, this provides insight into the general behavior of coherent acoustic phonon oscillations in charge-ordered materials.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: FG02-07ER46382; AC52-06NA25396
• OSTI ID: 1204688
• Alternate ID(s): OSTI ID: 1212179; OSTI ID: 1247297; OSTI ID: 1420567
• Report Number(s): LA-UR-15-22133
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Vol. 107 Journal Issue: 4; ISSN 0003-6951
• Publisher: American Institute of Physics
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
36 MATERIALS SCIENCE
phonons
photoexcitations
lattice constants
polarons
stress strain relations