Persistent low-energy phonon broadening near the charge-order q vector in the 
bilayer cuprate Bi2Sr2CaCu2O8+δ

He, Y.; Wu, S.; Song, Y.; Lee, W.; Said, A.; Alatas, A.; Bosak, A.; Girard, A.; Souliou, S.; Ruiz, A.; Hepting, M.; Bluschke, M.; Schierle, E.; Weschke, E.; Lee, J.; Jang, H.; Huang, H.; Hashimoto, M.; Lu, D.; Song, D.; Yoshida, Y.; Eisaki, H.; Shen, Z.; Birgeneau, R.; Yi, M.; Fraño, A.

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Persistent low-energy phonon broadening near the charge-order q vector in the bilayer cuprate Bi₂Sr₂CaCu₂O_8+δ

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Song, Y.
Scientific Facility Crystal Growth (Masahiko Isobe), Max Planck Institute for Solid State Research, Max Planck Society;

Hepting, M.
Max Planck Society;

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Citation

He, Y., Wu, S., Song, Y., Lee, W., Said, A., Alatas, A., et al. (2018). Persistent low-energy phonon broadening near the charge-order q vector in the bilayer cuprate Bi₂Sr₂CaCu₂O_8+δ. Physical Review B, 98(3): 035102.

Cite as: https://hdl.handle.net/21.11116/0000-000E-D464-2

Abstract

We report a persistent low-energy phonon broadening around qB similar to 0.28 reciprocal lattice unit (r.l.u.)along the Cu-O bond direction in the high-T-c cuprate Bi2Sr2CaCu2O8+delta (Bi-2212). We show that such broadening exists both inside and outside the conventional charge-density wave (CDW) phase, via temperature-dependent measurements in both underdoped and heavily overdoped samples. Combining inelastic hard x-ray scattering, diffuse scattering, angle-resolved photoemission spectroscopy, and resonant soft x-ray scattering at the Cu L-3-edge, we exclude the presence of a CDW in the heavily overdoped Bi-2212 similar to that observed in the underdoped systems. Finally, we discuss the origin of such anisotropic low-energy phonon broadening and its potential precursory role to the CDW phase in the underdoped region.