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  • Open Access

Phonon-mode-specific modulation of electronic states in molybdenum dioxide

Florence Burri*, Marko Hollm, Erik W. de Vos, Lukas Gallmann, Ursula Keller, and Sergej Neb

  • Department of Physics, ETH Zurich, Zurich, Switzerland

  • *Contact author: flburri@ethz.ch
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Phys. Rev. B 112, 104320 – Published 23 September, 2025

DOI: https://doi.org/10.1103/9zlm-bqbn

Abstract

Near-infrared pump and extreme ultraviolet probe transient absorption spectroscopy is employed to unravel the phonon-mode-specific modifications of electronic states near the Fermi energy in molybdenum dioxide. We observe distinct fingerprints of two coherent phonon modes at a frequency of 6 and 11THz which differ vastly in their energy-dependent modulations of the electronic response. By combining our measurements with density functional theory calculations, we show that the measured energy-dependent contrast between the phonon modes is primarily governed by the modification of the projected density of states. These findings highlight the pivotal role of lattice dynamics in the ultrafast electronic response.

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Phys. Rev. B 112, 104320– Published 23 September, 2025
  • Received 23 July 2025
  • Revised 1 September 2025
  • Accepted 9 September 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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