ŽELEZNÝ, Vladimír, Ondřej CAHA, A. SOUKIASSIAN, D.G. SCHLOM and X.X. XI. Temperature-dependent far-infrared reflectance of an epitaxial (BaTiO3)(8)/(SrTiO3)(4) superlattice. Physical Review B. AMERICAN PHYSICAL SOCIETY, 2017, vol. 95, No 21, p. "214110-1"-"214110-10", 10 pp. ISSN 2469-9950. Available from: https://dx.doi.org/10.1103/PhysRevB.95.214110. |
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@article{1384791, author = {Železný, Vladimír and Caha, Ondřej and Soukiassian, A. and Schlom, D.G. and Xi, X.X.}, article_number = {21}, doi = {http://dx.doi.org/10.1103/PhysRevB.95.214110}, keywords = {FERROELECTRIC THIN-FILMS; BATIO3/SRTIO3 SUPERLATTICES; POLARIZATION ENHANCEMENT; DIELECTRIC-CONSTANT; RAMAN-SPECTROSCOPY; PHASE-TRANSITIONS; STRAIN; NANOSCALE; SRTIO3; HETEROSTRUCTURES}, language = {eng}, issn = {2469-9950}, journal = {Physical Review B}, title = {Temperature-dependent far-infrared reflectance of an epitaxial (BaTiO3)(8)/(SrTiO3)(4) superlattice}, volume = {95}, year = {2017} }
TY - JOUR ID - 1384791 AU - Železný, Vladimír - Caha, Ondřej - Soukiassian, A. - Schlom, D.G. - Xi, X.X. PY - 2017 TI - Temperature-dependent far-infrared reflectance of an epitaxial (BaTiO3)(8)/(SrTiO3)(4) superlattice JF - Physical Review B VL - 95 IS - 21 SP - "214110-1"-"214110-10" EP - "214110-1"-"214110-10" PB - AMERICAN PHYSICAL SOCIETY SN - 24699950 KW - FERROELECTRIC THIN-FILMS KW - BATIO3/SRTIO3 SUPERLATTICES KW - POLARIZATION ENHANCEMENT KW - DIELECTRIC-CONSTANT KW - RAMAN-SPECTROSCOPY KW - PHASE-TRANSITIONS KW - STRAIN KW - NANOSCALE KW - SRTIO3 KW - HETEROSTRUCTURES N2 - Infrared reflectance spectra of the polar optic phonons in a [(BaTiO3)(8)/(SrTiO3)(4)](50) superlattice over the temperature range 8 to 650 K are reported. The spectra exhibit lattice vibration features typical of the perovskite constituents, BaTiO3 and SrTiO3. Using the effective medium approximation for multilayer systems and a fitting procedure, we were able to successfully simulate the infrared reflectivity of the superlattice structures and extract the parameters and dielectric functions of the phonons. When applied at varying temperatures, this approach provides the parameters of the zone-center polar phonons and their temperature dependence. Comparing these results with x-ray diffraction we identified some anomalies in phonon behavior related to the phase transitions that the superlattice undergoes. ER -
ŽELEZNÝ, Vladimír, Ondřej CAHA, A. SOUKIASSIAN, D.G. SCHLOM and X.X. XI. Temperature-dependent far-infrared reflectance of an epitaxial (BaTiO3)(8)/(SrTiO3)(4) superlattice. \textit{Physical Review B}. AMERICAN PHYSICAL SOCIETY, 2017, vol.~95, No~21, p.~''214110-1''-''214110-10'', 10 pp. ISSN~2469-9950. Available from: https://dx.doi.org/10.1103/PhysRevB.95.214110.
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