Structure and Raman scattering of Cs3C60 under high pressure

S. Fujiki; Y. Kubozono; S. Emura; Y. Takabayashi; S. Kashino; A. Fujiwara; K. Ishii; H. Suematsu; Y. Murakami; Y. Iwasa; T. Mitani; H. Ogata

doi:10.1103/PhysRevB.62.5366

Structure and Raman scattering of Cs₃C₆₀ under high pressure

S. Fujiki, Y. Kubozono, S. Emura, Y. Takabayashi, S. Kashino, A. Fujiwara, K. Ishii, H. Suematsu, Y. Murakami, Y. Iwasa, T. Mitani, H. Ogata

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Raman scattering is studied for a pressure-induced superconductor Cs₃C₆₀ in a pressure region from 1 bar to 62 kbar. The center frequency ω₀ for H_g(1) and H_g(2) Raman peaks increase by applying pressure, but the increase shows a saturation in the high-pressure region. On the other hand, the ω₀ for A_g(1) and A_g(2) modes increase monotonically in all pressure regions. The electron-phonon coupling constant for Cs₃C₆₀ shows a rapid decrease up to 30 kbar and an increase above 30 kbar. This result may be associated with a transformation from a multiphase (body-centered orthorhombic and A 15 phases) to a single phase around 20 kbar. X-ray powder diffraction pattern at 11 K under a pressure of 40 kbar shows that a superconducting phase for Cs₃C₆₀ is body-centered orthorhombic.

Original language	English
Pages (from-to)	5366-5369
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	62
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.62.5366
Publication status	Published - Sep 1 2000

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.62.5366

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Structure and Raman scattering of Cs₃C₆₀ under high pressure. / Fujiki, S.; Kubozono, Y.; Emura, S.; Takabayashi, Y.; Kashino, S.; Fujiwara, A.; Ishii, K.; Suematsu, H.; Murakami, Y.; Iwasa, Y.; Mitani, T.; Ogata, H.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 62, No. 9, 01.09.2000, p. 5366-5369.

Research output: Contribution to journal › Article › peer-review

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title = "Structure and Raman scattering of Cs3C60 under high pressure",

abstract = "Raman scattering is studied for a pressure-induced superconductor Cs3C60 in a pressure region from 1 bar to 62 kbar. The center frequency ω0 for Hg(1) and Hg(2) Raman peaks increase by applying pressure, but the increase shows a saturation in the high-pressure region. On the other hand, the ω0 for Ag(1) and Ag(2) modes increase monotonically in all pressure regions. The electron-phonon coupling constant for Cs3C60 shows a rapid decrease up to 30 kbar and an increase above 30 kbar. This result may be associated with a transformation from a multiphase (body-centered orthorhombic and A 15 phases) to a single phase around 20 kbar. X-ray powder diffraction pattern at 11 K under a pressure of 40 kbar shows that a superconducting phase for Cs3C60 is body-centered orthorhombic.",

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AU - Fujiki, S.

AU - Kubozono, Y.

AU - Emura, S.

AU - Takabayashi, Y.

AU - Kashino, S.

AU - Fujiwara, A.

AU - Ishii, K.

AU - Suematsu, H.

AU - Murakami, Y.

AU - Iwasa, Y.

AU - Mitani, T.

AU - Ogata, H.

PY - 2000/9/1

Y1 - 2000/9/1

N2 - Raman scattering is studied for a pressure-induced superconductor Cs3C60 in a pressure region from 1 bar to 62 kbar. The center frequency ω0 for Hg(1) and Hg(2) Raman peaks increase by applying pressure, but the increase shows a saturation in the high-pressure region. On the other hand, the ω0 for Ag(1) and Ag(2) modes increase monotonically in all pressure regions. The electron-phonon coupling constant for Cs3C60 shows a rapid decrease up to 30 kbar and an increase above 30 kbar. This result may be associated with a transformation from a multiphase (body-centered orthorhombic and A 15 phases) to a single phase around 20 kbar. X-ray powder diffraction pattern at 11 K under a pressure of 40 kbar shows that a superconducting phase for Cs3C60 is body-centered orthorhombic.

AB - Raman scattering is studied for a pressure-induced superconductor Cs3C60 in a pressure region from 1 bar to 62 kbar. The center frequency ω0 for Hg(1) and Hg(2) Raman peaks increase by applying pressure, but the increase shows a saturation in the high-pressure region. On the other hand, the ω0 for Ag(1) and Ag(2) modes increase monotonically in all pressure regions. The electron-phonon coupling constant for Cs3C60 shows a rapid decrease up to 30 kbar and an increase above 30 kbar. This result may be associated with a transformation from a multiphase (body-centered orthorhombic and A 15 phases) to a single phase around 20 kbar. X-ray powder diffraction pattern at 11 K under a pressure of 40 kbar shows that a superconducting phase for Cs3C60 is body-centered orthorhombic.

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Structure and Raman scattering of Cs₃C₆₀ under high pressure

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