Microscopic Hamiltonian for Zn or Ni substituted high temperature cuprate superconductors

Details Microscopic Hamiltonian for Zn or Ni substituted high temperature cuprate superconductors Microscopic Hamiltonian for Zn or Ni substituted high temperature cuprate superconductors

2002-05-29

arxiv.org/abs/cond-mat/0205607v2

Physical Review B 66, 174504 (2002)

Physics

Condensed Matter

Superconductivity

5 pages, a discussion on the c-axis hopping and its implication on the STM spectrum is added

Scientific paper

10.1103/PhysRevB.66.174504

We have derived the effective low energy Hamiltonian for Zn or Ni substituted high-T_c cuprates from microscopic three-band models consisting of the most relevant Cu or impurity 3d and O 2p orbitals. We find that both scattering potential and hopping integral induced by impurities have a finite range but decay very fast with distance from the impurity. The Zn scattering potential is very strong and attractive for electrons. The Ni scattering potential is much weaker than the Zn case, resulting from the hybridization between Ni ions and O holes. This profound difference is due to neither the electric charge nor d-level location, but rather because of the interplay between the valence state of the impurity and the strong correlation background. It gives a natural account for the unusual effect of Ni and Zn on the reduction of superconducting transition temperature. The interlayer hopping of electrons is highly anisotropic and nonlocal, determined by the in-plane electronic structure. This leads to a quantum interference of states from different sites and affects strongly the scanning tunneling spectrum perpendicular to CuO_2 planes.

Affiliated with

Also associated with

No associations

Rating

Microscopic Hamiltonian for Zn or Ni substituted high temperature cuprate superconductors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Microscopic Hamiltonian for Zn or Ni substituted high temperature cuprate superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microscopic Hamiltonian for Zn or Ni substituted high temperature cuprate superconductors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-168994