Naslov
Narrow Antiadiabatic Peak in Optimally Doped and Underdoped High-T_c Superconductors

Autori
Sunko, Denis K. ; Barišić, Slaven

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
The Journal of Physics and Chemistry of Solids / - , 2006, 316-320

Skup
7th International Conference on Spectroscopies in Novel Superconductors

Mjesto i datum
Sitges, Španjolska, 11.07.2004. - 16.07.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
High-temperature superconductors; ARPES

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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