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, Ayako Yamamoto, S. Tajima, Y. Endoh

Research output: Contribution to journalArticle

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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 languageEnglish
Pages (from-to)197005-197001
Number of pages5
JournalPhysical Review Letters
Volume92
Issue number19
DOIs
Publication statusPublished - 2004 May 14
Externally publishedYes

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softening
phonons
x ray scattering
analyzers
crystallinity
inelastic scattering
x ray diffraction
superconductivity
magnetic permeability
energy
radiation
crystals

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Uchiyama, H., Baron, A. Q. R., Tsutsui, S., Tanaka, Y., Hu, W. Z., Yamamoto, A., ... Endoh, Y. (2004). Softening of Cu-O bond stretching phonons in tetragonal HgBa 2CuO4+δ Physical Review Letters, 92(19), 197005-197001. https://doi.org/10.1103/PhysRevLett.92.197005

Softening of Cu-O bond stretching phonons in tetragonal HgBa 2CuO4+δ . / Uchiyama, H.; Baron, A. Q R; Tsutsui, S.; Tanaka, Y.; Hu, W. Z.; Yamamoto, Ayako; Tajima, S.; Endoh, Y.

In: Physical Review Letters, Vol. 92, No. 19, 14.05.2004, p. 197005-197001.

Research output: Contribution to journalArticle

Uchiyama, H, Baron, AQR, Tsutsui, S, Tanaka, Y, Hu, WZ, Yamamoto, A, Tajima, S & Endoh, Y 2004, 'Softening of Cu-O bond stretching phonons in tetragonal HgBa 2CuO4+δ ', Physical Review Letters, vol. 92, no. 19, pp. 197005-197001. https://doi.org/10.1103/PhysRevLett.92.197005
Uchiyama, H. ; Baron, A. Q R ; Tsutsui, S. ; Tanaka, Y. ; Hu, W. Z. ; Yamamoto, Ayako ; Tajima, S. ; Endoh, Y. / Softening of Cu-O bond stretching phonons in tetragonal HgBa 2CuO4+δ In: Physical Review Letters. 2004 ; Vol. 92, No. 19. pp. 197005-197001.
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