Quasiparticle photoemission intensity in doped two-dimensional quantum antiferromagnets

Details Quasiparticle photoemission intensity in doped two-dimensional quantum antiferromagnets Quasiparticle photoemission intensity in doped two-dimensional quantum antiferromagnets

1997-02-11

arxiv.org/abs/cond-mat/9702100v1

Phys. Rev. B 55, 14092 (1997)

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, latex, 3 figures

Scientific paper

10.1103/PhysRevB.55.14092

Using the self-consistent Born approximation, and the corresponding wave function of the magnetic polaron, we calculate the quasiparticle weight corresponding to destruction of a real electron (in contrast to creation of a spinless holon), as a funtion of wave vector for one hole in a generalized $t-J$ model and the strong coupling limit of a generalized Hubbard model. The results are in excellent agreement with those obtained by exact diagonalization of a sufficiently large cluster. Only the Hubbard weigth compares very well with photoemission measurements in Sr_2CuO_2Cl_2.

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