@inproceedings{0e032776ee3f4efd88bf79dcf1d77527,
title = "Ultrafast multi-terahertz probes of symmetry breaking in a stripe-phase correlated oxide",
abstract = "The application of transient terahertz (THz) pulses to excite and probe low-energy quantum and collective excitations in materials represents a powerful tool to study both intrinsic interactions and non-equilibrium phases. In the following, we discuss ultrafast multi-THz studies that resolve the dynamics of electronic itineracy and vibrational symmetries in a strongly-correlated nickelate. Many transition-metal oxides exhibit the emergence of {"}stripes,{"} corresponding to quasione-dimensional charge, spin and lattice modulations as a manifestation of strong correlations. In our experiments, optical excitation of a stripe-phase nickel oxide triggers the rapid melting of its atomic-scale charge order and results in dynamics that yields insight into the couplings underlying the stripes. The transient optical conductivity is sensitive to both charges and in-plane vibrations and reveals a succession of ultrafast processes, ranging from rapid delocalization and localization of charges, via a time-delayed reaction of vibrational distortions to the electronic quench, up to the multi-picosecond re-establishment of the symmetry-broken phase.",
keywords = "Photo-induced phase transitions, Quantum materials, Quasiparticle dynamics, Terahertz spectroscopy, Ultrafast phenomena",
author = "G. Coslovich and B. Huber and S. Behl and Kemper, {A. F.} and T. Sasagawa and Bechtel, {H. A.} and Martin, {M. C.} and Kaindl, {R. A.}",
note = "Funding Information: We thank W.-S. Lee, Z.-X. Shen, Y.-D. Chuang, A. Cavalleri, A. Lanzara, M. Trigo and R. W. Schoenlein for scientific discussions and/or contributions to the early stages of this work. The research was primarily funded by the U.S. Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Contract DE-EAC02-E05CH11231 (Ultrafast Materials Science program KC220c3o) vering ultrafast and equilibrium THz studies and data analysis (G.C., S.B., B.H., R.A.K.). In the equilibrium FTIR characterization, our research employed resources of the Advanced Light Source, a DOE Office of Science User Facility supported under Contract DE-EAC02-E05CH11231 (H.A.B., M.C.M.). Furthermore, B.H. and S.B. acknowledge student fellowships from the German Academic Exchange Service to travel to and participate in the research at Berkeley. Publisher Copyright: {\textcopyright} 2018 SPIE.; Terahertz Emitters, Receivers, and Applications IX 2018 ; Conference date: 19-08-2018 Through 20-08-2018",
year = "2018",
doi = "10.1117/12.2322682",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Manijeh Razeghi and Baranov, {Alexei N.}",
booktitle = "Terahertz Emitters, Receivers, and Applications IX",
}