Share Email Print

Proceedings Paper

Nanoscale charge-order dynamics in stripe-phase nickelates probed via ultrafast THz spectroscopy
Author(s): G. Coslovich; Sascha Behl; B. Huber; H. A. Bechtel; T. Sasagawa; M. C. Martin; R. A. Kaindl
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

We discuss equilibrium and ultrafast optical pump-THz probe spectroscopy of the model stripe-ordered system La1.75Sr0.25NiO4. We present a multi-oscillator analysis of the phonon bending mode splitting observed at low temperatures in equilibrium, along with a variational model for the transient THz reflectivity variations. The low temperature splitting is directly related to the formation of the long-range stripe-order, while the background conductivity is reminiscent of the opening of the mid-IR pseudogap. Ultrafast experiments in the multi-THz spectral range show strong THz reflectivity variations around the phonon bending mode frequency (≈11 THz).

Paper Details

Date Published: 14 March 2015
PDF: 6 pages
Proc. SPIE 9361, Ultrafast Phenomena and Nanophotonics XIX, 93611D (14 March 2015); doi: 10.1117/12.2080724
Show Author Affiliations
G. Coslovich, Lawrence Berkeley National Lab. (United States)
Sascha Behl, Lawrence Berkeley National Lab. (United States)
B. Huber, Lawrence Berkeley National Lab. (United States)
H. A. Bechtel, Lawrence Berkeley National Lab. (United States)
T. Sasagawa, Tokyo Institute of Technology (Japan)
M. C. Martin, Lawrence Berkeley National Lab. (United States)
R. A. Kaindl, Lawrence Berkeley National Lab. (United States)

Published in SPIE Proceedings Vol. 9361:
Ultrafast Phenomena and Nanophotonics XIX
Markus Betz; Abdulhakem Y. Elezzabi; Kong-Thon Tsen, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?