Quasiparticle photoemission intensity in doped two-dimensional quantum antiferromagnets
نویسندگان
چکیده
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 Sr2CuO2Cl2. PACS numbers: 75.10.Jm, 79.60.-i, 74.72.-h
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