%0 Journal Article
%T Low energy excitation in La[sub:2]CuO[sub:4]
%A Varyukhin, S. V.
%A Zakharov, A. A.
%A Gershenzon, E. M.
%A Gol'tsman, G. N.
%A Ptitsina, N. G.
%A Chulkova, G. M.
%J Sverkhprovodimost': Fizika, Khimiya, Tekhnika
%D 1990
%V 3
%N 5
%F Varyukhin_etal1990
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1688), last updated on Thu, 27 May 2021 21:17:11 -0500
%X Measurements of transmission and photoconductivity spectra in submillimeter wave length range as well as of capacity C and conductivity G in the region of acoustic frequencies of metal-dielectric-La2CuO4 system at low temperatures are performed using La2CuO4 monocrystals. Optical spectra posses a threshold character, a sharp decrease of transmission and photocoductivity signal occurs in the energy region hν>1.5 MeV. C(ω,T) and G(ω, T) dependences have a universal form typical of Debye type relaxation processes. Relaxation time dependence is of thermoactivated character τ(T)∼exp(ξ/T) with the gap value ξ≅2 meV. It is assumed that excitations with characteristic energy of ∼2 meV exist in La2CuO4. A possible nature of the detected low-energy excitations is discussed.
%K metal-dielectric-La2CuO4
%K monocrystals
%U https://inis.iaea.org/search/searchsinglerecord.aspx?recordsFor=SingleRecord&RN=22081972
%P 832-837