ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The optical spectra of some high-Tc cuprates show anomalous bump around 450 cm −1 and dramatic phonon changes for E parallel to c axis, which grows at low temperatures. This phenomenon has been observed in Yba 2 Cu 3 O 6.6, YBa 2 Cu 4 O 8 and Pb 2 Sr 2 RCu 3 O 8 , but not in (La,Sr) 2 CuO 4. In this study, we report the first observation of a similar anomaly in underdoped Bi 2 Sr 2 CaCu 2 O 8. The spectra were measured from two mosaics of Ba 2 Sr 2 CaCu 2 O 8 with T c 80 K and 60 K. Considering that these spectral features seem to be common for all high-T c cuprates with double CuO pyramids, we propose one plausible explanation that it is attributed to the second Josephson plasmon for intracell coupling in the Josephson coupled layer model.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022509920303
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