Electronic pseudogap of optimally doped high-temperature Nd2−xCexCuO4 superconductors

Znanstveni rad - Izvorni znanstveni rad

• Autor: Denis K. Sunko
• Autor: Slaven Barišić
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

We study the effect of antiferromagnetic correlations in the three-band Emery model, in comparison with the experimental angle-resolved photoemission spectra (ARPES) in optimally doped Nd2−xCexCuO4 (NCCO). The same calculation, formerly used to describe Bi2Sr2CaCu2O8+δ (BSCCO), is applied here, but in contrast to BSCCO, where quantum paramagnon fluctuations are important, the characteristic energy of the dispersive paramagnons in NCCO is of the order of Tc. The wide dispersing features of the single-electron spectrum in NCCO are analogous to the BSCCO hump. The Fermi surface is pseudogapped in both the nodal and antinodal directions, although the detailed features differ, being dominated by loss of intensity in the nodal direction, and loss of coherence in the antinodal one. Direct oxygen-oxygen hopping is important in NCCO as well as in BSCCO, in order to obtain overall agreement with the measured ARPES spectra.

• Ključne riječi (engleski): ARPES; pseudogap; high-Tc; superconductivity
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical review B: Condensed matter and materials physics
• Brojčani podaci: vol. 75, br. 6, 060506(R)
• p-ISSN: 1098-0121
• e-ISSN: 1550-235X
• DOI: https://doi.org/10.1103/PhysRevB.75.060506
• URN:NBN: urn:nbn:hr:217:335621
• Datum objave publikacije: 2007
• URL dokumenta: http://link.aps.org/doi/10.1103/PhysRevB.75.060506
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: Copyright (2007) by the American Physical Society.
• Datum i vrijeme pohrane: 2019-10-16 15:48:16