Ultrafast multi-terahertz probes of symmetry breaking in a stripe-phase correlated oxide

G. Coslovich, B. Huber, S. Behl, A. F. Kemper, T. Sasagawa, H. A. Bechtel, M. C. Martin, R. A. Kaindl

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish (US)
Title of host publicationTerahertz Emitters, Receivers, and Applications IX
EditorsManijeh Razeghi, Alexei N. Baranov
ISBN (Electronic)9781510620834
StatePublished - 2018
Externally publishedYes
EventTerahertz Emitters, Receivers, and Applications IX 2018 - San Diego, United States
Duration: Aug 19 2018Aug 20 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceTerahertz Emitters, Receivers, and Applications IX 2018
Country/TerritoryUnited States
CitySan Diego


  • Photo-induced phase transitions
  • Quantum materials
  • Quasiparticle dynamics
  • Terahertz spectroscopy
  • Ultrafast phenomena

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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