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Proceedings Paper

Ultrafast mid-infrared spectroscopy of the charge- and spin-ordered nickelates
Author(s): G. Coslovich; B. Huber; W.-S. Lee; Y.-D. Chuang; Y. Zhu; T. Sasagawa; Z. Hussain; H. A. Bechtel; M. C. Martin; R. W. Schoenlein; Z.-X. Shen; R. A. Kaindl
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Paper Abstract

We discuss the mid-infrared optical response of a charge and spin-ordered nickelate in the ultrafast time domain. A strong photo-induced modulation of the optical reflectivity is observed on the sub-picosecond timescale, indicating the transient filling and recovery of the pseudogap in the mid-infrared charge transport. A variational Kramers-Kronig analysis of equilibrium reflectivity data is extended to time-resolved experiments, allowing us to extract the optical conductivity despite a comparatively limited frequency range of tunable femtosecond parametric sources. The fast dynamics of the spectral weight transfer supports an electronic origin of the mid-infrared pseudogap in nickelates.

Paper Details

Date Published: 14 March 2013
PDF: 6 pages
Proc. SPIE 8623, Ultrafast Phenomena and Nanophotonics XVII, 862308 (14 March 2013); doi: 10.1117/12.2005366
Show Author Affiliations
G. Coslovich, Lawrence Berkeley National Lab. (United States)
B. Huber, Lawrence Berkeley National Lab. (United States)
W.-S. Lee, SLAC National Accelerator Lab. (United States)
Y.-D. Chuang, Lawrence Berkeley National Lab. (United States)
Y. Zhu, Lawrence Berkeley National Lab. (United States)
T. Sasagawa, Tokyo Institute of Technology (Japan)
Z. Hussain, Lawrence Berkeley National Lab. (United States)
H. A. Bechtel, Lawrence Berkeley National Lab. (United States)
M. C. Martin, Lawrence Berkeley National Lab. (United States)
R. W. Schoenlein, Lawrence Berkeley National Lab. (United States)
Z.-X. Shen, SLAC National Accelerator Lab. (United States)
R. A. Kaindl, Lawrence Berkeley National Lab. (United States)


Published in SPIE Proceedings Vol. 8623:
Ultrafast Phenomena and Nanophotonics XVII
Markus Betz; Abdulhakem Y. Elezzabi; Jin-Joo Song; Kong-Thon Tsen, Editor(s)

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