Quasiparticles and c-axis coherent hopping in high T_c superconductors

Details Quasiparticles and c-axis coherent hopping in high T_c superconductors Quasiparticles and c-axis coherent hopping in high T_c superconductors

2001-12-20

arxiv.org/abs/cond-mat/0112390v1

Phys. Rev. B {\bf 63}, R60504 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.63.060504

We study the problem of the low-energy quasiparticle spectrum of the extended t-J model and analyze the coherent hopping between weakly coupled planes described by this model. Starting with a two-band model describing the Cu-O planes and the unoccupied bands associated to the metallic atoms located in between the planes, we obtain effective hopping matrix elements describing the c-axis charge transfer. A computational study of these processes shows an anomalously large charge anisotropy for doping concentrations around and below the optimal doping.

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