Infrared reflectivity of SrRuO3

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We discuss the infrared reflectivity of strontium rutenate, SrRuO3, measured from 40 cm-1 to 10000 cm-1. The relative high reflectance at low frequencies and the semimetallic behavior at values between 300 cm-1 and 1900 cm-1 found in this compound is in accordance with a system with relatively free...

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Detalles Bibliográficos
Autores principales: De La Cruz, F.P., Massa, N.E., Cuffini, S.L., Carbonio, R.E.
Formato: JOUR
Materias:
Electrons
Infrared spectroscopy
Light absorption
Light reflection
Mathematical transformations
Numerical analysis
Phonons
Photoconductivity
Kramers-Kronig analysis
Multioscillator analyses
Optical conductivity
Orthorhombic structure
Reflectivity decays
Semimetallic behavior
Solid state synthesis
Strontium rutenate
Strontium compounds
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00150193_v185_n1-4_p277_DeLaCruz
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:We discuss the infrared reflectivity of strontium rutenate, SrRuO3, measured from 40 cm-1 to 10000 cm-1. The relative high reflectance at low frequencies and the semimetallic behavior at values between 300 cm-1 and 1900 cm-1 found in this compound is in accordance with a system with relatively free carriers. Two weak absorptions at about 450 cm-1 and 800 cm-1 are assigned to the interaction between electrons and longitudinal phonons . The reflectivity decays rather sharply up to about 3900 cm-1 and then decreases asymptotically at higher energies. From Kramers-Kronig and multioscillator analyses we obtain the effective carrier number N* = 7.07 1018 cm-3, the effective mobility μ* = 142.6 cm2V-1sec-1 and the optical conductivity σo = 175.6 Ω-1cm-1.

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