TY  - JOUR
AU  - Varyukhin, S. V.
AU  - Zakharov, A. A.
AU  - Gershenzon, E. M.
AU  - Gol'tsman, G. N.
AU  - Ptitsina, N. G.
AU  - Chulkova, G. M.
PY  - 1990
DA  - 1990//
TI  - Low energy excitation in La[sub:2]CuO[sub:4]
T2  - Sverkhprovodimost': Fizika, Khimiya, Tekhnika
JO  - Sverkhprovodimost': Fizika, Khimiya, Tekhnika
SP  - 832
EP  - 837
VL  - 3
IS  - 5
KW  - metal-dielectric-La2CuO4
KW  - monocrystals
AB  - 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.
UR  - https://inis.iaea.org/search/searchsinglerecord.aspx?recordsFor=SingleRecord&RN=22081972
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1688), last updated on Thu, 27 May 2021 21:17:11 -0500
ID  - Varyukhin_etal1990
ER  -