Вышедшие номера
Phonon density of states in gamma-, beta- and alpha-AgCuS
Skomorokhov A.N.1, Trots D.M.2, Sashin I.L.3, Fuess H.2, Jadrowskii E.L.3, Ovchinnikov S.G.1
1State Scientific Center --- Institute for Physics and Power Engineering, Obninsk, Russia
2Institute for Material Science, Darmstadt University of Technology, Darmstadt, Germany
3Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia
Email: romoks@mail.ru
Поступила в редакцию: 12 апреля 2007 г.
Выставление онлайн: 20 января 2008 г.

This paper describes studies of ternary superionic conductor AgCuS by means of inelastic neutron scattering at temperatures from 150 to 398 K. Experimental time-of-flight spectra were recalculated into the generalized phonon density of states (G(varepsilon) ) in the frame of incoherent approximation. It is shown that G(varepsilon) of AgCuS has a nontrivial temperature dependence in the low-energy range. The relation between the temperature dependence of G(varepsilon) and existence of the LE-mode in AgCuS is discussed. PACS: 63.20.-e, 66.10.Ed, 78.70.Nx