6533b854fe1ef96bd12ade47

RESEARCH PRODUCT

Optical phonons in theNaTiSi2O6oxide withS=12spin chains

M. IsobeZoran B. PopovićZoran B. PopovićM. J. KonstantinovićValentin N. PopovAndrés CantareroY. UedaZorana Dohčević-mitrović

subject

Phase transitionMaterials scienceCondensed matter physicsPhononOxide02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesElectronic Optical and Magnetic Materialschemistry.chemical_compoundchemistryLattice (order)0103 physical sciences010306 general physics0210 nano-technologyValence electron

description

. The infrared-active phonon frequencies are obtained by Kramers-Kronig analy-sis of the reflectivity data. The assignment of the observed modes is done using lattice dynamical calculationsbased on the valence shell model. A phase transition at about 210 K is manifested through a dramatic changeof the mode frequency and broadening, and the appearance of new phonon modes. Analyzing the phononfrequency and damping vs temperature we have found that the phase transition leaves a fingerprint in thephonon dynamics of NaTiSi

yearjournalcountryeditionlanguage
2005-06-15Physical Review B
https://doi.org/10.1103/physrevb.71.224302