Publication
Title
Many-body large polaron optical conductivity in $SrTi_{1-x}Nb_{x}O_{3}$
Author
Abstract
 Recent experimental data on the optical conductivity of niobium-doped SrTiO3 are interpreted in terms of a gas of large polarons with effective coupling constant αeff≈2. The theoretical approach takes into account many-body effects, the electron-phonon interaction with multiple LO-phonon branches, and the degeneracy and the anisotropy of the Ti t2g conduction band. Based on the Fröhlich interaction, the many-body large polaron theory provides an interpretation for the essential characteristics, exceptinterestinglyfor the unexpectedly large intensity of a peak at ∼130 meV, of the observed optical conductivity spectra of SrTi1−xNbxO3 without any adjustment of material parameters.
Language
English
Source (journal)
Physical review : B : condensed matter and materials physics. - Lancaster, Pa, 1998 - 2015
Publication
Lancaster, Pa : 2010
ISSN
1098-0121 [print]
1550-235X [online]
Volume/pages
81:12(2010), p. 125119,1-125119,9
ISI
000276248900056
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
 Faculty/Department Research group [E?say:metaLocaldata.cgzprojectinf] Dynamic effects in coupled superconductor-ferromagnet nanosystems. Publication type Subject Affiliation Publications with a UAntwerp address