N. E. Sluchanko, A. N. Azarevich, M. A. Anisimov, A. V. Bogach, S. Yu. Gavrilkin, V. V. Glushkov, S. V. Demishev, A. A. Maksimov, I. I. Tartakovskii, E. V. Filatov, V. B. Filippov, A. B. Lyashchenko, “Raman scattering in ZrB<nobr>$_{12}$</nobr> cage glass”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2016, Volume 103, Issue 11,Pages <nobr>767

This article is cited in 6 papers

OPTICS AND NUCLEAR PHYSICS

Raman scattering in ZrB$_{12}$ cage glass

N. E. Sluchanko^ab, A. N. Azarevich^a, M. A. Anisimov^a, A. V. Bogach^a, S. Yu. Gavrilkin^c, V. V. Glushkov^ab, S. V. Demishev^ab, A. A. Maksimov^d, I. I. Tartakovskii^d, E. V. Filatov^d, V. B. Filippov^e, A. B. Lyashchenko^e

^a Prokhorov General Physics Institute, Russian Academy of Sciences
^b Moscow Institute of Physics and Technology (State University)
^c Lebedev Physical Institute, Russian Academy of Sciences
^d Institute of Solid State Physics, Russian Academy of Sciences
^e Frantsevich Institute for Problems of Materials Science, National Academy of Sciences of Ukraine

Abstract: High-precision measurements of the Hall effect and Raman scattering have been performed for single crystals of ZrB$_{12}$ superconductor in the wide temperature range of $5$–$300$ K. For ZrB$_{12}$, the boson peak with $\omega_{\mathrm{max}} \sim 100$ cm$^{-1}$ has been observed for the first time within the low-frequency range of the Raman spectrum $I(\omega)$. The sizes of vibrational clusters with the correlation length ranging from $25$ to $35$ Å are estimated. The relation between the renormalization of the low-frequency density of vibrational states accompanying the transition to the cage-glass phase ($T^*\sim90$ K) and the enhancement of superconductivity in ZrB$_{12}$ is discussed.

Received: 05.04.2016
Revised: 22.04.2016

DOI: 10.7868/S0370274X16110035