A multi-frequency EPR spectroscopy approach in the detection of boson peak excitations (CROSBI ID 173989)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Kveder, Marina ; Merunka, Dalibor ; Ilakovac, Amon ; Rakvin, Boris
engleski
A multi-frequency EPR spectroscopy approach in the detection of boson peak excitations
The influence of boson peak (BP) excitations on low-temperature spin-lattice relaxation rate of a paramagnetic center embedded in a glassy matrix is investigated in the context of multi- frequency electron paramagnetic resonance (EPR) detection. In the theoretical analysis, the transition rate of spin one-half in the presence of a phonon field is calculated within the approximation of Fermi’s golden rule. Several phonon densities of states are compared, among which one originating from a model of quasi-localized vibrations has been introduced into electron spin relaxation formalism for the first time. The respective frequency dependencies of spin-lattice relaxation rates are predicted which should lead to observable effects of BP modes if a multifrequency study at very low temperatures is performed.
boson peak ; multifrequency EPR ; electron spin-lattice relaxation
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Podaci o izdanju
213 (1)
2011.
26-31
objavljeno
1090-7807
10.1016/j.jmr.2011.08.029