Перегляд за автором "Pashkevich, Yu."

Сортувати за: Порядок: Результатів:

  • Low-dimensional magnetism of spin-½ chain systems α- and β-TeVO₄: a comparative study 
    Gnezdilov, V.; Lemmens, P.; Wulferding, D.; Pashkevich, Yu.; Lamonova, K.; Choi, K.-Y.; Afanasiev, O.; Gnatchenko, S.; Berger, H. (Физика низких температур, 2012)
    We present a comparative study of the low-dimensional compounds α- and β-TeVO₄. Our data clearly show that the change in the local coordination geometry of V⁴⁺ ions comparing α- and β-TeVO₄ leads to a drastic differences in ...
  • Low temperature mixed spin state of Co³⁺ in LaCoO₃ evidenced from Jahn–Teller lattice distortions 
    Gnezdilov, V.; Choi, K.-Y.; Pashkevich, Yu.; Lemmens, P.; Shiryaev, S.; Bychkov, G.; Barilo, S.; Fomin, V.; Yeremenko, A.V. (Физика низких температур, 2006)
    One- and multi-phonon excitations of the single crystalline LaCoO₃ were studied using Raman spectroscopy in the temperature region of 5–300 K. First-order Raman spectra show a larger number of phonon modes than allowed ...
  • Phase separation in iron chalcogenide superconductor Rb₀.₈₊xFe₁.₆₊ySe₂ as seen by Raman light scattering and band structure calculations 
    Pashkevich, Yu.; Gnezdilov, V.; Lemmens, P.; Shevtsova, T.; Gusev, A.; Lamonova, K.; Wulferding, D.; Gnatchenko, S.; Pomjakushina, E.; Conder, K. (Физика низких температур, 2016)
    We report Raman light scattering in the phase separated superconducting single crystal Rb₀.₇₇Fe₁.₆₁Se₂ with Tc = 32 K over a wide temperature region 3–500 K. The observed phonon lines from the majority vacancy ordered ...
  • Phonon excitations in the quasi-one-dimensional Haldane phase of SrNi₂V₂O₈ 
    Kurnosov, V.; Gnezdilov, V.; Lemmens, P.; Pashkevich, Yu.; Bera, A.K.; Islam, A.T.M.N.; Lake, B. (Физика низких температур, 2018)
    Vibrational Raman spectra of a single crystal of the coupled Haldane chain compound SrNi₂V₂O₈ with uniaxial anisotropy were investigated in the 10–1000 cm⁻¹ frequency range at temperatures 7–300 K. No structural phase ...
  • Phonons and magnons in stripe-ordered nickelates. A Raman scattering study 
    Gnezdilov, V.; Kurnosov, V.; Pashkevich, Yu.; Lemmens, P.; Tranquada, J.; Choi, K.-Y.; Güntherodt, G.; Nakajima, K.; Yeremenko, A. (Физика низких температур, 2005)
    Electronic correlation effects in La₂-xSrxNiO₄ (x = 1/3 and 0.225) lead to spontaneous phase separation into microscopic spin/charge stripes with commensurate and incommensurate order, respectively. Raman scattering ...
  • Structural phase transition in two-dimensional tetramer-cuprate Na₅RbCu₄(AsO₄)₄Cl₂ 
    Gnezdilov, V.; Bedarev, V.; Pashkevich, Yu.; Lemmens, P.; Zvyagin, S.; Gnatchenko, S.; Pashchenko, M.; Mo, X.; Queen, W.; Hwu, S.J. (Физика низких температур, 2007)
    Using Raman scattering and optical birefringence we have investigated a low-temperature phase transition in single crystal of the two-dimensional Na₅RbCu₄(AsO₄)₄Cl₂. Phonon anomalies point to a first order nature of the ...