Search for light-induced intrinsic localized modes: negative result

0387004 - FZÚ 2013 RIV GB eng J - Článek v odborném periodiku
Kempa, Martin - Ondrejkovič, Petr - Ollivier, J. - Rols, S. - Kulda, J. - Margueron, S. - Fernandez, M. - Hlinka, Jiří
Search for light-induced intrinsic localized modes: negative result.
Ferroelectrics. Roč. 440, č. 1 (2012), 42-46. ISSN 0015-0193. E-ISSN 1563-5112
Grant CEP: GA ČR GPP204/11/P404
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: alkali halides * intrinsic localized modes * phonon density of states * inelastic neutron scattering
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 0.415, rok: 2012

We have attempted to induce the theoretically predicted anharmonic lattice modes called intrinsic localized modes in the NaI single crystal lattice by UV excitation of the impurity electronic states of Tl+ substitution centers. Comparison of low-temperature phonon density of states measured by inelastic neutron scattering with and without simultaneous UV illumination of the sample did not reveal significant difference. Results are discussed in the context of possible improvements of the proposed experiment.
Trvalý link: http://hdl.handle.net/11104/0216211