Electronic Raman scattering spectra of Sr2RuO4 single crystals

Yamanaka, Akio; Asayama, Norio; Sasada, M.; Inoue, Kuon; Udagawa, Masayuki; Nishizaki, Shin-ya; Maeno, Y.; Fujita, Toshizo

doi:10.1016/0921-4534(95)00727-x

Cited by 11 publications

(1 citation statement)

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“…8 Yamanaka et al estimated the scattering rate of the charge carrier from the structureless continuum spectrum extending to 4000 cm Ϫ1 . 9 However, these results were obtained with crystals of relatively low temperature of superconductivity T c ϭ0.97 K. With careful treatment during crystal growth, T c has been increased up to 1.5 K, which is believed to be close to the intrinsic T c of Sr 2 RuO 4 . Such dramatic change in the sample quality gives us the possibility of obtaining information in Raman scattering.…”

Section: Introductionmentioning

confidence: 94%

Anisotropic properties of the excitation spectrum ofSr2RuO4crystals
Sakita
¹
,
Nimori
²
,
Mao
³

et al. 2001
Phys. Rev. B
25
1
10
0
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We have systematically investigated the totally symmetric Raman-scattering spectra of Sr 2 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 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 cm Ϫ1 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 RuO 2 plane below 60 cm Ϫ1 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 ϭ0.97 K. The observed magnetic excitation suggests that the magnetic correlation is also important in understanding the mechanism of superconductivity of Sr 2 RuO 4 .

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Section: Introductionmentioning

confidence: 94%

Anisotropic properties of the excitation spectrum ofSr2RuO4crystals
Sakita
¹
,
Nimori
²
,
Mao
³

et al. 2001
Phys. Rev. B
25
1
10
0
View full text Add to dashboard Cite

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Optical Spectroscopic Studies of Metal-Insulator Transitions in Perovskite-Related Oxides

Cooper

2001

Structure and Bonding

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Fermi liquid properties and superconductivity of Sr2RuO4

Maeno

Yoshida

1996

Czech J Phys

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Electronic Raman scattering spectra of Sr2RuO4 single crystals

Cited by 11 publications

References 5 publications

Anisotropic properties of the excitation spectrum ofSr2RuO4crystals
Sakita
¹
,
Nimori
²
,
Mao
³

et al. 2001
Phys. Rev. B
25
1
10
0
View full text Add to dashboard Cite

Anisotropic properties of the excitation spectrum ofSr2RuO4crystals
Sakita
¹
,
Nimori
²
,
Mao
³

et al. 2001
Phys. Rev. B
25
1
10
0
View full text Add to dashboard Cite

Optical Spectroscopic Studies of Metal-Insulator Transitions in Perovskite-Related Oxides

Fermi liquid properties and superconductivity of Sr2RuO4

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Electronic Raman scattering spectra of Sr2RuO4 single crystals

Cited by 11 publications

References 5 publications

Anisotropic properties of the excitation spectrum ofSr2RuO4crystalsSakita1, Nimori2, Mao3 et al. 2001Phys. Rev. B251100View full textAdd to dashboardCite

Anisotropic properties of the excitation spectrum ofSr2RuO4crystalsSakita1, Nimori2, Mao3 et al. 2001Phys. Rev. B251100View full textAdd to dashboardCite

Optical Spectroscopic Studies of Metal-Insulator Transitions in Perovskite-Related Oxides

Fermi liquid properties and superconductivity of Sr2RuO4

Contact Info

Product

Resources

About

Anisotropic properties of the excitation spectrum ofSr2RuO4crystals
Sakita
¹
,
Nimori
²
,
Mao
³

et al. 2001
Phys. Rev. B
25
1
10
0
View full text Add to dashboard Cite

Anisotropic properties of the excitation spectrum ofSr2RuO4crystals
Sakita
¹
,
Nimori
²
,
Mao
³

et al. 2001
Phys. Rev. B
25
1
10
0
View full text Add to dashboard Cite