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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.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory-National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE
OSTI Identifier:
1529123
Resource Type:
Journal Article
Journal Name:
Proc. SPIE 10756, Terahertz Emitters, Receivers, and Applications IX
Additional Journal Information:
Journal Name: Proc. SPIE 10756, Terahertz Emitters, Receivers, and Applications IX
Country of Publication:
United States
Language:
English

Citation Formats

Kaindl, Robert A., Coslovich, Giacomo, Huber, Bernhard, Behl, Sascha, Kemper, Alexander F., Sasagawa, Takao, Bechtel, Hans A., Martin, Michael C., Razeghi, Manijeh, and Baranov, Alexei N. Ultrafast multi-terahertz probes of symmetry breaking in a stripe-phase correlated oxide. United States: N. p., 2018. Web. doi:10.1117/12.2322682.
Kaindl, Robert A., Coslovich, Giacomo, Huber, Bernhard, Behl, Sascha, Kemper, Alexander F., Sasagawa, Takao, Bechtel, Hans A., Martin, Michael C., Razeghi, Manijeh, & Baranov, Alexei N. Ultrafast multi-terahertz probes of symmetry breaking in a stripe-phase correlated oxide. United States. doi:10.1117/12.2322682.
Kaindl, Robert A., Coslovich, Giacomo, Huber, Bernhard, Behl, Sascha, Kemper, Alexander F., Sasagawa, Takao, Bechtel, Hans A., Martin, Michael C., Razeghi, Manijeh, and Baranov, Alexei N. Fri . "Ultrafast multi-terahertz probes of symmetry breaking in a stripe-phase correlated oxide". United States. doi:10.1117/12.2322682.
@article{osti_1529123,
title = {Ultrafast multi-terahertz probes of symmetry breaking in a stripe-phase correlated oxide},
author = {Kaindl, Robert A. and Coslovich, Giacomo and Huber, Bernhard and Behl, Sascha and Kemper, Alexander F. and Sasagawa, Takao and Bechtel, Hans A. and Martin, Michael C. and Razeghi, Manijeh and Baranov, Alexei N.},
abstractNote = {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.},
doi = {10.1117/12.2322682},
journal = {Proc. SPIE 10756, Terahertz Emitters, Receivers, and Applications IX},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {9}
}