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- W1991454355 abstract "We have systematically investigated the totally symmetric Raman-scattering spectra of ${mathrm{Sr}}_{2}{mathrm{RuO}}_{4}$ crystals in the temperature region between room temperature and 6 K. The electron-phonon interaction for the apical oxygen vibration has been experimentally investigated by a line-shape analysis based on the Fano interference model. It has been found that the electron-phonon interaction strongly depends on not only the polarization geometry but also the phonon-propagating direction. The phonon, which travels along the ${mathrm{RuO}}_{2}$ plane in the $(a,a)$ geometry, shows the strongest electron-phonon interaction. The intensity of the broad background due to the magnetic excitation has been suppressed in the energy region less than 300 ${mathrm{cm}}^{ensuremath{-}1}$ at low temperature. Furthermore, the anisotropic formation of the spin gap has been also observed in excitation spectra with the propagation vector parallel to the ${mathrm{RuO}}_{2}$ plane below $60{mathrm{cm}}^{ensuremath{-}1}$ at 7 K. These anisotropic properties have been obtained for a crystal with a high superconductivity transition temperature of 1.4 K. The sample quality is very important, since such an anisotropic property has not been observed in the Raman spectra for samples with ${T}_{c}=0.97mathrm{K}.$ The observed magnetic excitation suggests that the magnetic correlation is also important in understanding the mechanism of superconductivity of ${mathrm{Sr}}_{2}{mathrm{RuO}}_{4}.$" @default.
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- W1991454355 date "2001-03-15" @default.
- W1991454355 modified "2023-10-03" @default.
- W1991454355 title "Anisotropic properties of the excitation spectrum of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>RuO</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>crystals<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=…" @default.
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- W1991454355 doi "https://doi.org/10.1103/physrevb.63.134520" @default.
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