Softening of Cu-O bond stretching phonons in tetragonal HgBa 2CuO4+δ

H. Uchiyama; A. Q.R. Baron; S. Tsutsui; Y. Tanaka; W. Z. Hu; A. Yamamoto; S. Tajima; Y. Endoh

doi:10.1103/PhysRevLett.92.197005

Softening of Cu-O bond stretching phonons in tetragonal HgBa ₂CuO_4+δ

H. Uchiyama, A. Q.R. Baron, S. Tsutsui, Y. Tanaka, W. Z. Hu, A. Yamamoto, S. Tajima, Y. Endoh

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

73 Citations (Scopus)

Abstract

The phonon dispersion of Hg1201 was studied using inelastic x-ray scattering. The crystallinity was examined using x-ray diffraction, and four spherically curved analyzer crystals were used on the 10 m horizontal arm to analyze the scattered radiation. Magnetic susceptibility measurement showed a sharp superconductivity transition at 94 K, indicating that the sample was nearly optimally doped. The results show that the shell model described well the dispersion of the low-energy modes, while the Cu-O bond stretching mode at high energy showed strong softening towards the zone boundary, deviating strongly from the model.

Original language	English
Article number	197005
Pages (from-to)	197005-1-197005-4
Journal	Physical Review Letters
Volume	92
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.92.197005
Publication status	Published - 2004 May 14
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.92.197005

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title = "Softening of Cu-O bond stretching phonons in tetragonal HgBa 2CuO4+δ",

abstract = "The phonon dispersion of Hg1201 was studied using inelastic x-ray scattering. The crystallinity was examined using x-ray diffraction, and four spherically curved analyzer crystals were used on the 10 m horizontal arm to analyze the scattered radiation. Magnetic susceptibility measurement showed a sharp superconductivity transition at 94 K, indicating that the sample was nearly optimally doped. The results show that the shell model described well the dispersion of the low-energy modes, while the Cu-O bond stretching mode at high energy showed strong softening towards the zone boundary, deviating strongly from the model.",

author = "H. Uchiyama and Baron, {A. Q.R.} and S. Tsutsui and Y. Tanaka and Hu, {W. Z.} and A. Yamamoto and S. Tajima and Y. Endoh",

note = "Funding Information: PRBMDO 0163-1829 64 , 054516 ( 2001 ). 10.1103/PhysRevB.64.054516 We are grateful to L. Pintschovius for useful suggestions. This work was supported by the New Energy ?>and Industrial Technology Department Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Ap?>plications. The synchrotron radiation experiments were performed at the BL35XU in the SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2002B0287-ND3-np, 2003A0555-ND3-np). H. U. and S. Tsutsui acknowledge financial support by the JSPS. ",

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doi = "10.1103/PhysRevLett.92.197005",

language = "English",

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T1 - Softening of Cu-O bond stretching phonons in tetragonal HgBa 2CuO4+δ

AU - Uchiyama, H.

AU - Baron, A. Q.R.

AU - Tsutsui, S.

AU - Tanaka, Y.

AU - Hu, W. Z.

AU - Yamamoto, A.

AU - Tajima, S.

AU - Endoh, Y.

N1 - Funding Information: PRBMDO 0163-1829 64 , 054516 ( 2001 ). 10.1103/PhysRevB.64.054516 We are grateful to L. Pintschovius for useful suggestions. This work was supported by the New Energy ?>and Industrial Technology Department Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Ap?>plications. The synchrotron radiation experiments were performed at the BL35XU in the SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2002B0287-ND3-np, 2003A0555-ND3-np). H. U. and S. Tsutsui acknowledge financial support by the JSPS.

PY - 2004/5/14

Y1 - 2004/5/14

N2 - The phonon dispersion of Hg1201 was studied using inelastic x-ray scattering. The crystallinity was examined using x-ray diffraction, and four spherically curved analyzer crystals were used on the 10 m horizontal arm to analyze the scattered radiation. Magnetic susceptibility measurement showed a sharp superconductivity transition at 94 K, indicating that the sample was nearly optimally doped. The results show that the shell model described well the dispersion of the low-energy modes, while the Cu-O bond stretching mode at high energy showed strong softening towards the zone boundary, deviating strongly from the model.

AB - The phonon dispersion of Hg1201 was studied using inelastic x-ray scattering. The crystallinity was examined using x-ray diffraction, and four spherically curved analyzer crystals were used on the 10 m horizontal arm to analyze the scattered radiation. Magnetic susceptibility measurement showed a sharp superconductivity transition at 94 K, indicating that the sample was nearly optimally doped. The results show that the shell model described well the dispersion of the low-energy modes, while the Cu-O bond stretching mode at high energy showed strong softening towards the zone boundary, deviating strongly from the model.

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Softening of Cu-O bond stretching phonons in tetragonal HgBa ₂CuO_4+δ

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