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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Basic information
Original name Temperature-dependent far-infrared reflectance of an epitaxial (BaTiO3)(8)/(SrTiO3)(4) superlattice
Name in Czech Teplotní závislost reflektance epitaxní supermřížky (BaTiO3)(8)/(SrTiO3)(4) ve vzdálené infračervené oblasti
Authors ŽELEZNÝ, Vladimír (203 Czech Republic), Ondřej CAHA (203 Czech Republic, guarantor, belonging to the institution), A. SOUKIASSIAN (840 United States of America), D.G. SCHLOM (840 United States of America) and X.X. XI (840 United States of America).
Edition Physical Review B, AMERICAN PHYSICAL SOCIETY, 2017, 2469-9950.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10302 Condensed matter physics
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
Impact factor Impact factor: 3.813
RIV identification code RIV/00216224:14310/17:00097121
Organization unit Faculty of Science
Doi http://dx.doi.org/10.1103/PhysRevB.95.214110
UT WoS 000403345100001
Keywords (in Czech) feroelektrické tenké vrstvy; BaTiO3/SrTiO3 supermřížky
Keywords in English FERROELECTRIC THIN-FILMS; BATIO3/SRTIO3 SUPERLATTICES; POLARIZATION ENHANCEMENT; DIELECTRIC-CONSTANT; RAMAN-SPECTROSCOPY; PHASE-TRANSITIONS; STRAIN; NANOSCALE; SRTIO3; HETEROSTRUCTURES
Tags NZ, rivok
Tags International impact, Reviewed
Changed by Changed by: Ing. Nicole Zrilić, učo 240776. Changed: 12/4/2018 12:02.
Abstract
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.
Abstract (in Czech)
Infračervená spektra optických fononů v supermřížce [(BaTiO3)(8)/(SrTiO3)(4)](50) byla naměřena pro teploty od 8 do 650K.
Links
LM2011020, research and development projectName: CEITEC ? open access
Investor: Ministry of Education, Youth and Sports of the CR
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