@Article{Varyukhin_etal1990,
author="Varyukhin, S. V.
and Zakharov, A. A.
and Gershenzon, E. M.
and Gol{\textquoteright}tsman, G. N.
and Ptitsina, N. G.
and Chulkova, G. M.",
title="Low energy excitation in La$_{2}$CuO$_{4}$",
journal="Sverkhprovodimost{\textquoteright}: Fizika, Khimiya, Tekhnika",
year="1990",
volume="3",
number="5",
pages="832--837",
optkeywords="metal-dielectric-La2CuO4; monocrystals",
abstract="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 h$\nu$>1.5 MeV. C($\omega$,T) and G($\omega$, T) dependences have a universal form typical of Debye type relaxation processes. Relaxation time dependence is of thermoactivated character $\tau$(T)\~{}exp($\xi$/T) with the gap value $\xi$≅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.",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=1688), last updated on Thu, 27 May 2021 21:17:11 -0500",
opturl="https://inis.iaea.org/search/searchsinglerecord.aspx?recordsFor=SingleRecord&RN=22081972"
}