Evolution of the Pseudogap State of High-{ital T{sub c}} Superconductors with Doping

Journal Article · Tue Oct 01 00:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.3212· OSTI ID:388366

Puchkov, A V; Fournier, P; Basov, D N; Timusk, T; Kapitulnik, A; Kolesnikov, N N ^[1]

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1. 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, Vol. 77, Issue 15; Other Information: PBD: Oct 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
HIGH-TC SUPERCONDUCTORS
ENERGY GAP
INFRARED SPECTRA
BISMUTH OXIDES
LEAD OXIDES
STRONTIUM OXIDES
CALCIUM OXIDES
COPPER OXIDES
THALLIUM OXIDES
DOPED MATERIALS
FREQUENCY DEPENDENCE
TEMPERATURE DEPENDENCE