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 Publications

  • Emmanuel B. Amuah, Khalid M. Siddiqui, Maurizio Monti, Allan S. Johnson, and Simon E. Wall. Determination and correction of spectral phase from principal component analysis of coherent phonons. Optics Express Vol. 32, Issue 3, pp. 3817-3825 (2024). doi:10.1364/OE.514141

  • Gilberto A de la Peña Muñoz, Alfredo A Correa, Shan Yang, Olivier Delaire, Yijing Huang, Allan S Johnson, Tetsuo Katayama, Viktor Krapivin, Ernest Pastor, David A Reis, Samuel Teitelbaum, Luciana Vidas, Simon Wall, Mariano Trigo. Ultrafast lattice disordering can be accelerated by electronic collisional forces. Nature Physics (2023) doi:10.1038/s41567-023-02118-z

  • Allan S. Johnson, Daniel Pérez-Salinas, Khalid M. Siddiqui, Sungwon Kim, Sungwook Choi, Klara Volckaert, Paulina E. Majchrzak, Søren Ulstrup, Kent Hallman, Richard F. Haglund Jr., Christian M. Günther, Bastian Pfau, Stefan Eisebitt, Dirk Backes, Francesco Maccherozzi, Ann Fitzpatrick, Sarnjeet Dhesi, Pierluigi Gargiani, Manuel Valvidares, Hyeongi Choi, Dogeun Jang, Abhishek Katoch, Soonnam Kwon, Sang Han Park, Hyunjung Kim, Simon E. Wall. Ultrafast X-ray imaging of the light-induced phase transition in VO2. Nature Physics (2022) doi:10.1038/s41567-022-01848-w.

  • A. S. Johnson, D. Moreno-Mencía, E. B. Amuah, M. Menghini, J.-P. Locquet, C. Gianetti, E. Pastor, S. E. Wall. Ultrafast loss of lattice coherence in the light-induced structural phase transition of V2O3. Physical Review Letters 129, 255701 (2022). doi:10.1103/PhysRevLett.129.255701.

  • Douglas Garratt, Lukas Misiekis, David Wood, Esben Witting Larsen, Mary Matthews, Oliver Alexander, Peng Ye, Sebastian Jarosch, Clement Ferchaud, C Strüber, AS Johnson, AA Bakulin, TJ Penfold, JP Marangos. Direct observation of ultrafast exciton localization in an organic semiconductor with soft X-ray transient absorption spectroscopy. Nature Communications 13 (1), 1-8 (2022).  doi:10.1038/s41467-022-31008-w
  • Utso Bhattacharya, Swati Chaudhary, Tobias Grass, Allan S Johnson, Simon Wall and Maciej Lewenstein. Fermionic Chern insulator from twisted light with linear polarization. Rev. B105, L081406 (2022) doi:10.1103/PhysRevB.105.L081406
  • Ernest Pastor, David Moreno-Mencía, Maurizio Monti, Allan S Johnson, Nina Fleischmann, Cuixiang Wang, Youguo Shi, Xuerong Liu, Daniel G Mazzone, Mark PM Dean, Simon Wall. Nonthermal breaking of magnetic order via photogenerated spin defects in the spin-orbit coupled insulator Sr3Ir2O7.  Rev. B 105, 064409 (2022) doi:10.1103/PhysRevB.105.064409
  • Daniel Perez-Salinas*, Allan S Johnson*, Dharmalingam Prabhakaran, Simon Wall. Multi-mode excitation drives disorder during the ultrafast melting of a C4-symmetry-broken phase. Nature Communications 13, 238 (2022). doi:10.1038/s41467-021-27819-y*equal contribution