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Add to Calendar 2/26/2018 2:00 pm 2/27/2018 America/Chicago Special Condensed Matter Seminar: "Ultrafast dynamic control of emergent phases in transition metal oxides.." DESCRIPTION:

In correlated transition metal oxides (TMOs), ?interactions between the electron, lattice, spin and orbital degrees of ?freedom (DOFs) have proven to be a fertile land of emergent ?quantum phenomena? and competing quantum phases. The delicate balance between these competing quantum phases are often sensitive to standard external stimuli, including pressure, magnetic and electric field, offering avenues for new functionalities and unveiling fundamental physics of quantum materials. In the past decades, profound advancement of material science and ultrafast science opens up exciting possibilities for exploiting ultrafast laser spectroscopy to dynamically study and control emergent phases in quantum materials with photons. In this talk, I will describe state-of-the-art ultrafast spectroscopic technique that enabled us to access the photo-induced states in TMOs. I will show examples that demonstrate ultrafast dynamic control of strongly correlated quantum materials by mode-selective excitation with pulsed electromagnetic field. These include: (i) Recent discovery of a new collective mode induced by optical excitation in a stripe-ordered cuprate superconductor La2-xBaxCuO4, evidenced by time-domain THz spectroscopy. (ii) Cooperative photo-induced metastable “hidden” phase in a colossal magnetoresistance (CMR) manganite La0.67Ca0.33MnO3, investigated by ultrafast far-field pump-probe spectroscopy and near-field scanning optical microscopy.

\n\nSPEAKER:

Jingdi Zhang, University of California, San Diego

190 ESB

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Special Condensed Matter Seminar: "Ultrafast dynamic control of emergent phases in transition metal oxides.."

Speaker Jingdi Zhang, University of California, San Diego
Date: 2/26/2018 - 2/27/2018
Time: 2 p.m.
Location:

190 ESB

Event Contact: Marjorie Gamel
217-333-3762
mgamel@illinois.edu
Sponsor:

Department of Physics

Event Type: Seminar/Symposium
 

In correlated transition metal oxides (TMOs), ?interactions between the electron, lattice, spin and orbital degrees of ?freedom (DOFs) have proven to be a fertile land of emergent ?quantum phenomena? and competing quantum phases. The delicate balance between these competing quantum phases are often sensitive to standard external stimuli, including pressure, magnetic and electric field, offering avenues for new functionalities and unveiling fundamental physics of quantum materials. In the past decades, profound advancement of material science and ultrafast science opens up exciting possibilities for exploiting ultrafast laser spectroscopy to dynamically study and control emergent phases in quantum materials with photons. In this talk, I will describe state-of-the-art ultrafast spectroscopic technique that enabled us to access the photo-induced states in TMOs. I will show examples that demonstrate ultrafast dynamic control of strongly correlated quantum materials by mode-selective excitation with pulsed electromagnetic field. These include: (i) Recent discovery of a new collective mode induced by optical excitation in a stripe-ordered cuprate superconductor La2-xBaxCuO4, evidenced by time-domain THz spectroscopy. (ii) Cooperative photo-induced metastable “hidden” phase in a colossal magnetoresistance (CMR) manganite La0.67Ca0.33MnO3, investigated by ultrafast far-field pump-probe spectroscopy and near-field scanning optical microscopy.

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