@Article{Varyukhin_etal1990,
author="Varyukhin, S. V.
and Zakharov, A. A.
and Gershenzon, E. M.
and Gol{\textquoteright}tsman, G. N.
and Ptitsyna, N. G.
and Chulkova, G. M.",
title="AC losses and submillimeter absorption in single crystals La2CuO4",
journal="Phys. B Condens. Mat.",
year="1990",
volume="165-166",
pages="1269--1270",
optkeywords="metal-dielectric-La2Cu04",
abstract="The La2CuO4 single crystals were used to carry out the measurements of transmission spectra within the submillimeter range of wavelengths, as well as the capacitance C and conductivity G in the region of acoustic frequencies of the metal-dielectric-La2Cu04 system at low temperatures. The optical spectra display a threshold character. There takes place a sharp decreasing of transmission signal in the energy range of h$\upsilon$>1.5meV. The C($\omega$,T) and G($\omega$,T) dependences have a universal form characteristic of relaxation processes of the Debye type. The relaxation time dependence displays a thermoactivation character $\tau$(T)-exp($\xi$/T) with a gap value of $\xi$≃2meV,coinciding with the optical one. It is assumed that there exist excitations with a characteristic energy {\textasciitilde} 2meV in La2Cu04.A possible nature of the revealed low-energy excitations is discussed.",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=1686), last updated on Thu, 27 May 2021 21:00:55 -0500",
issn="0921-4526",
doi="10.1016/S0921-4526(09)80220-2",
opturl="https://linkinghub.elsevier.com/retrieve/pii/S0921452609802202",
opturl="https://doi.org/10.1016/S0921-4526(09)80220-2"
}