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  1. Feb 2, 2024The nature of the insulator-to-metal phase transition in vanadium dioxide (VO2) is one of the longest-standing problems in condensed-matter physics. Ultrafast spectroscopy has long promised to determine whether the transition is primarily driven by the electronic or structural degree of freedom, but measurements to date have been stymied by their sensitivity to only one of these components and ...
  2. Decoupled few-femtosecond phase transitions in vanadium dioxide Christian Brahms 1* , Lin Zhang 2 , Xiao Shen 3 , Utso Bhattacharya 2,4 , Maria Recasens 2 , Johann Osmond 2 , Tobias Grass 5,6 , Ravindra W. Chhajlany 7 , Kent A. Hallman 8 , Richard F. Haglund 8 , Sokrates T. Pantelides 8,9 , Maciej Lewenstein 2,10 ,
  3. paperswithcode.com

    Feb 2, 2024Decoupled few-femtosecond phase transitions in vanadium dioxide ... The nature of the insulator-to-metal phase transition in vanadium dioxide (VO2) is one of the longest-standing problems in condensed-matter physics. ... from oscillations around the equilibrium high-symmetry atomic positions during an unprecedentedly fast structural transition ...
  4. export.arxiv.org

    Feb 2, 2024Abstract: The nature of the insulator-to-metal phase transition in vanadium dioxide (VO2) is one of the longest-standing problems in condensed-matter physics. Ultrafast spectroscopy has long promised to determine whether the transition is primarily driven by the electronic or structural degree of freedom, but measurements to date have been stymied by their sensitivity to only one of these ...
  5. The insulator-to-metal phase transition in vanadium dioxide (VO 2) is a canonical example of such correlations. Here, few-femtosecond extreme UV transient absorption spectroscopy (FXTAS) at the vanadium M 2,3 edge is used to track the insulator-to-metal phase transition in VO 2. This technique allows observation of the bulk material in real ...
  6. Feb 5, 20241. Heriot-Watt University 2. Institute of Photonic Sciences 3. University of Memphis 4. ETH Zurich 5. Donostia International Physics Center 6. Ikerbasque 7. Adam Mickiewicz University in Poznań 8. Vanderbilt University 9. Institució Catalana de Recerca i Estudis Avançats 10.
  7. Feb 2, 2024Nonequilibrium phase transitions driven by light pulses represent a rapidly developing field in condensed matter physics. As one of the archetypal strongly correlated materials, vanadium dioxide (VO2) undergoes a structural phase transition (SPT) from a monoclinic (M1) to rutile (R) structure and an insulator-to-metal transition (IMT) either when heated above 340 K or when excited by an ...
  8. The low-temperature M 1-VO 2 phase is characterized by the dimerization of V chains along the c axis of high-temperature R-VO 2 phase (), leading to the doubling of unit cell volume.Compared to the V-V bond length d R = 2.88 Å in R-VO 2, the dimerization leads to shorter and longer bond lengths d S = 2.47 Å and d L = 3.17 Å, while the zigzag patterns give rise to V-V-V twisting angle θ ≈ ...
  9. ncbi.nlm.nih.gov

    National Center for Biotechnology Information

    https://www.ncbi.nlm.nih.gov › pmc › articles › PMC9635820

    Vanadium dioxide (VO 2) is one of the archetypal strongly correlated materials (1, 2). It undergoes a first-order phase transition from the monoclinic (M 1) insulating phase to the rutile (R) metallic phase at T c ≈ 340 K . The charge, lattice, orbital, and spin degrees of freedom are strongly coupled together.

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