• Technical Conference: 

    09 – 14 May 2021

  • Exhibition: 

    10 – 14 May 2021

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Post Session


Ultrafast and out-of-equilibrium dynamics in strongly correlated electron systems

Presider: Liuyan Zhao, University of Michigan

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Super-Resolution Momentum-Comb Spectroscopy of Quantum-Material Bands (FF2L.1)
Presenter: Markus Borsch, University of Michigan

Our theory--experiment comparison discovers crystal-momentum combs, electronic interferences in momentum space, in harmonic sideband emission and demonstrates how the comb lines assign electronic bands of quantum materials with super-resolution.

Authors:Markus Borsch, University of Michigan / Christoph Schmid, University of Regensburg / Leonard Weigl, University of Regensburg / Stefan Schlauderer, University of Regensburg / Christoph Lange, University of Regensburg / Johannes Steiner, University of Marburg / Stephan Koch, University of Marburg / Rupert Huber, University of Regensburg / Mackillo Kira, University of Michigan


Ultrafast Signatures of Spin and Orbital Order in the Antiferromagnetic Mott Insulator Sr2CrO4 (FF2L.2)

We used femtosecond time-resolved optical spectroscopy to study ultrafast dynamics of photoexcited carriers in the antiferromagnetic Mott insulator Sr2CrO4, revealing distinct time-domain signatures of different spin and orbital orders.

Authors:Min-Cheol Lee, LOS ALAMOS NATIONAL LABORATORY / Connor Occhialini, MIT / Jiarui Li, MIT / Zhihai Zhu, Chinese Academy of Sciences / La Moyne Mix, LOS ALAMOS NATIONAL LABORATORY / Dmitry Yarotski, LOS ALAMOS NATIONAL LABORATORY / Riccardo Comin, MIT / Rohit Prasankumar, LOS ALAMOS NATIONAL LABORATORY


Theoretical Understanding of Photon Spectroscopies in Correlated Materials Out of Equilibrium (FF2L.3)
Presenter: Tom Devereaux, Stanford University

To be provided

Authors:Tom Devereaux, Stanford University


Ultrafast Photo-Induced Melting of the Trimer Superstructure in TaTe2 (FF2L.4)
Presenter: Khalid Siddiqui, Lawrence Berkeley National Laboratory

We report the first ultrafast study of TaTe2, utilizing MeV-scale ultrafast electron diffraction to reveal rapid photo-induced melting of its low-temperature trimer superstructure. Density-functional calculations indicate intra-trimer charge transfer as a trigger of this transformation.

Authors:Khalid Siddiqui, Lawrence Berkeley National Laboratory / Daniel Durham, Lawrence Berkeley National Laboratory / Frederick Cropp, University of California, Los Angeles / Sangeeta Rajpurohit, Lawrence Berkeley National Laboratory / Colin Ophus, Lawrence Berkeley National Laboratory / Yanglin Zhu, Pennsylvania State University / Johan Carlström, Lawrence Berkeley National Laboratory / Camille Stavrakas, Lawrence Berkeley National Laboratory / Zhiqiang Mao, Pennsylvania State University / Archana Raja, Lawrence Berkeley National Laboratory / Pietro Musumeci, University of California, Los Angeles / Liang Tan, Lawrence Berkeley National Laboratory / Andrew Minor, Lawrence Berkeley National Laboratory / Daniele Filippetto, Lawrence Berkeley National Laboratory, / Robert Kaindl, Lawrence Berkeley National Laboratory


BaFe2as2 Investigated by Pump-Probe Spectroscopy Under High Pressures (FF2L.5)
Presenter: Ivan Fotev, Helmholtz-Zentrum Dresden-Rossendorf

We utilize pump-probe spectroscopy at pressures in the GPa range to measure the quasiparticle relaxation dynamics of BaFe2As2. The results reveal the pressure dependences of the spin-density wave condensate energy and the photoexcited quasiparticle lifetimes.

Authors:Ivan Fotev, Helmholtz-Zentrum Dresden-Rossendorf / Saicharan Aswartham, Leibniz Institute for Solid State and Materials Research Dresden / Bernd Büchner, Leibniz Institute for Solid State and Materials Research Dresden / Harald Schneider, Helmholtz-Zentrum Dresden-Rossendorf / Manfred Helm, Helmholtz-Zentrum Dresden-Rossendorf / Alexej Pashkin, Helmholtz-Zentrum Dresden-Rossendorf