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Creators/Authors contains: "Lysenko, Sergiy"

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  1. ; ; ; ; ; (, Optica Publishing Group)
    Femtosecond spectroscopy of FeSe film shows distinct transient nematic behavior below and above superconducting critical temperature. Results reveal correlations between photoinduced nematicity, quasiparticle formation, superconducting and pseudogap openings, emphasizing electronic correlations and preformed electron pairing. 
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    Free, publicly-accessible full text available November 27, 2025
  2. ; ; ; ; ; ; ; (, Optica Publishing Group)
    Time-resolved ultrafast reflectivity measurements along with the two-temperature model analysis reveal a complex interplay between optical nonlinearities, structural phase transition, electronic correlations, electron-phonon energy transfer, and the second moment of Eliashberg function in FeSe0.8Te0.2. 
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    Full Text Available 
  3. ; ; ; ; (, AIP Advances)
    Vanadium oxide V3O5 exhibits an insulator-to-metal transition (IMT) near 430 K, which is the highest value for all vanadium oxides exhibiting IMTs. This makes it interesting for advanced electronic applications. However, the properties of V3O5 have been little studied, and, in particular, there are no reports of experimentally determined mechanical properties. In this work, Young’s modulus of sputter-deposited V3O5 thin films has been determined by measuring the fundamental resonant frequency of V3O5-coated silicon microcantilevers using a laser beam deflection technique. After deposition, the films were characterized by x-ray diffraction, resistivity measurements, and atomic force microscopy. The value of Young’s modulus experimentally determined for V3O5 was 198 ± 14 GPa, which is slightly lower than the computationally derived values for bulk crystal V3O5. 
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  4. ; ; ; ; ; ; (, MRS Advances)
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  5. ; ; ; ; ; ; ; ; ; ; et al (, Optica Publishing Group)
    Femtosecond photoexcitation of Ba(Fe0.92Co0.08)2As2superconductors reveals distinct dynamics of laser fluence-dependent ultrafast processes. The modified two-temperature model shows the complex interplay between thermalization time constants, electron-phonon coupling parameters, and level of optical excitation. 
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    Full Text Available 
  6. ; ; ; ; ; ; ; (, MRS Advances)
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  7. ; ; ; ; (, Frontiers in Optics / Laser Science, OSA Technical Digest)
    null (Ed.)
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  8. ; ; ; (, Frontiers in Optics / Laser Science, OSA Technical Digest)
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  9. ; ; ; ; ; (, Optics Letters)