Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi

The role of in-plane oxygens in optimally doped NCCO (CROSBI ID 128038)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Sunko, Denis K. ; Barišić, Slaven The role of in-plane oxygens in optimally doped NCCO // Journal of superconductivity and novel magnetism, 20 (2007), 7; 623-627. doi: 10.1007/s10948-007-0250-7

Podaci o odgovornosti

Sunko, Denis K. ; Barišić, Slaven

engleski

The role of in-plane oxygens in optimally doped NCCO

Within the framework of the three-band Hubbard (Emery) model of high-temperature superconductors, we find a new physical regime for the electron-doped compound NCCO at optimal doping. It is characterized by a strong renormalization of the bare copper-oxygen hopping, similar to the one occuring on the hole-doped side, and a low value of the effective copper-oxygen splitting. The effective copper-oxygen hopping appears smaller than the direct oxygen-oxygen hopping, which is not renormalized. After a zeroth-order fit of the Fermi surface is achieved, ARPES data throughout the zone are reproduced by adding a simple phenomenological weak-coupling antiferromagnetic perturbation of the conduction electrons. The dispersive antiferromagnons have low energy, but no long-range order. We can show that the experimental situation corresponds to a pseudogap across the whole Fermi surface. The wide dispersive features in NCCO ARPES spectra are analogous to the hump in BSCCO. The oxygen degree of freedom dominates the band structure of both NCCO and BSCCO, however in NCCO this cannot be demonstrated without simultaneously accounting for the antiferromagnetic scattering. The difference in Tc of the two compounds may be related to the difference in the calculated densities of states.

ARPES; pseudogap; high-Tc; superconductivity

Pozvano predavanje na 5th International Conference Stripes06, Rim, Italija, 17.12.-22.12.2006.

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o izdanju

20 (7)

2007.

623-627

objavljeno

1557-1939

10.1007/s10948-007-0250-7

Povezanost rada

Fizika

Poveznice