Raman study of phonon modes in bismuth pyrochlores
نویسندگان
چکیده
D. J. Arenas,1,2 L. V. Gasparov,1 Wei Qiu,3 J. C. Nino,3 Charles H. Patterson,4 and D. B. Tanner2 1Department of Physics, University of North Florida, Jacksonville, Florida 32224, USA 2Department of Physics, University of Florida, Gainesville, Florida 32611, USA 3Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, USA 4School of Physics, Trinity College Dublin, Dublin 2, Ireland Received 10 July 2010; revised manuscript received 19 November 2010; published 21 December 2010
منابع مشابه
Coherent phonon excitation in bismuth
Ultrafast time-resolved reflectivity of a bismuth thin film evaporated on a silicon substrate is measured to investigate coherent phonons in bismuth. The reflectivity result is analyzed by a linear chirp approximation to obtain the time dependent frequencies of coherent phonons. Not only the optical modes are detected, which are generated by a combination of impulsive stimulated Raman scatterin...
متن کاملSpectroscopy, Structural, and Optical Investigations of NiFe2O4 Ferrite
Ni ferrite crystalline material is synthesized using a sol-gel method at two different temperatures. The vibrational and stretching modes, crystalline phase, size distribution and morphology of the products are investigated via Raman back-scattering and Fourier transform infrared (FTIR) spectroscopy, XRD and FESEM, respectively. Vibrational modes of spinel ferrite are observed at Raman and FTIR...
متن کاملنرم شدگی فونونهای انرژی بالا با گذار عایق - ابررسانا در سیستم ابررسانای Ba1-xKxBiO3
Single crystals of Ba1-xKxBiO3 compound for 0 < x <0.6 from insulator to superconducting region have been grown by electrochemical method. The crystals have been characterized by powder x-ray diffraction and Laue x-ray to determine the crystal structure, formed phases and potassium concentration. Inelastic x-ray scattering spectrum of the crystals has been studied to investigate the phonon pro...
متن کاملRaman Spectroscopy of Two-Dimensional Bi2TexSe3 − x Platelets Produced by Solvothermal Method
In this paper, we report a facile solvothermal method to produce both binary and ternary compounds of bismuth chalcogenides in the form of Bi₂TexSe3 - x. The crystal morphology in terms of geometry and thickness as well as the stoichiometric ratio can be well controlled, which offers the opportunities to systematically investigate the relationship between microstructure and phonon scattering by...
متن کاملRaman spectroscopy of few-quintuple layer topological insulator Bi2Se3 nanoplatelets.
We report on Raman spectroscopy of few quintuple layer topological insulator bismuth selenide (Bi2Se3) nanoplatelets (NPs), synthesized by a polyol method. The as-grown NPs exhibit excellent crystalline quality, hexagonal or truncated trigonal morphology, and uniformly flat surfaces down to a few quintuple layers. Both Stokes and anti-Stokes Raman spectroscopy for the first time resolve all fou...
متن کامل