Narrow Antiadiabatic Peak in Optimally Doped and Underdoped High-T_c Superconductors (CROSBI ID 503374)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Sunko, Denis K. ; Barišić, Slaven
engleski
Narrow Antiadiabatic Peak in Optimally Doped and Underdoped High-T_c Superconductors
We study the effect of antiferromagnetic (AF) correlations in the three-band Emery model, with respect to the experimental situation in weakly underdoped and optimally doped BSCCO. In the vicinity of the vH singularity of the conduction band there appears a central peak in the middle of a pseudogap, due to an antiadiabatic quasiparticle, which is insensitive to the energy scale of the mechanism responsible for the pseudogap. We find a quantum low-temperature regime, in which the pseudogap profile is created by zero-point motion of the magnons. Detailed analysis of the spectral functions along the (pi, 0)-(pi, pi) line shows significant agreement with experiment. We conclude that optimally doped BSCCO has a well-developed pseudogap of the order of 1000 K. This is only masked by the antiadiabatic quasiparticle, which provides the experimentally observed small binding energy scale.
High-temperature superconductors; ARPES
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Podaci o prilogu
316-320-x.
2006.
objavljeno
Podaci o matičnoj publikaciji
The Journal of Physics and Chemistry of Solids
Podaci o skupu
Nepoznat skup
poster
29.02.1904-29.02.2096