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On the 590cm-1 B1g feature in underdoped Bi2Sr2CaCu2O8+delta

Kevin C. Hewitt·N. L. Wang·J. C. Irwin·D. M. Pooke·A. E. Pantoja·H. J. Trodahl
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Abstract

Raman scattering studies have been performed on underdoped Bi2Sr2CaCu2O8+delta. In single crystals underdoped by oxygen removal, a 590 cm-1 peak is observed in the B1g spectrum. The feature is observed to soften in frequency by 3.8% with isotopic exchange for 16-O by 18-O. In contrast, the 590cm-1 peak is not observed in crystals underdoped by Y substitution which suggests that it correspond to a disorder induced vibrational mode. We have also found that underdoping leads to a depletion of low energy spectral weight from regions of the Fermi surface located near the Brillouin zone axes.

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Kevin C. Hewitt, N. L. Wang, J. C. Irwin, D. M. Pooke, A. E. Pantoja, H. J. Trodahl. 1999-04-01. On the 590cm-1 B1g feature in underdoped Bi2Sr2CaCu2O8+delta. https://doi.org/10.1103/physrevb.60.r9943

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