@inproceedings{1423ed7376194d6ba25f3c1f14e801c3,
title = "Nanoscale charge-order dynamics in stripe-phase nickelates probed via ultrafast THz spectroscopy",
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).",
keywords = "charge order, nickelate, phonon dynamics, pseudogap, stripes, THz spectroscopy, ultrafast dynamics",
author = "G. Coslovich and S. Behl and B. Huber and Bechtel, {H. A.} and T. Sasagawa and Martin, {M. C.} and Kaindl, {R. A.}",
year = "2015",
doi = "10.1117/12.2080724",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Markus Betz and Kong-Thon Tsen and Elezzabi, {Abdulhakem Y.}",
booktitle = "Ultrafast Phenomena and Nanophotonics XIX",
note = "Ultrafast Phenomena and Nanophotonics XIX ; Conference date: 08-02-2015 Through 11-02-2015",
}