Evolution of the Pseudogap State of High-{ital T{sub c}} Superconductors with Doping
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S4M1 (CANADA)
We report on a study of the infrared properties of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}, Bi{sub 1.66}Pb{sub 0.34}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}, and Tl{sub 2}Ba{sub 2}CuO{sub 6+{delta}} crystals at doping levels from underdoped to strongly overdoped. We calculate the frequency-dependent scattering rate 1/{tau}({omega},{ital T}) and study its doping dependence. While we observe a normal-state gaplike depression in 1/{tau}({omega},{ital T}) in the underdoped regime, it is not observed in the overdoped regime. While the high-frequency 1/{tau}({omega},{ital T}) is temperature independent in the underdoped regime, it scales with temperature in the overdoped regime. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 388366
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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