2006/07/31 by D. K. Sunko, S. Barišić, S. Barisic
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.75.060506
published as Phys. Rev. B 75, 060506(R) (2007) · Final version as accepted in PRB(RC), one paragraph added, 4 pages, 3 figures
arxiv created 2007/02/09 · openalex publication_date 2007/02/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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 Nd_2\ensuremath-xCexCuO4 (NCCO). The same calculation, formerly used to describe Bi2Sr2CaCu2O_8+\ensuremathδ (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.