X-ray edge singularity in integrable lattice models of correlated electrons

Details X-ray edge singularity in integrable lattice models of correlated electrons X-ray edge singularity in integrable lattice models of correlated electrons

1997-02-27

arxiv.org/abs/cond-mat/9702234v2

Phys. Rev. B56 (1997) 6631-6641

Physics

Condensed Matter

Strongly Correlated Electrons

16 pages of revtex, 8 figures, some typos corrected, references added

Scientific paper

10.1103/PhysRevB.56.6631

We study the singularities in X-ray absorption spectra of one-dimensional Hubbard and $t$--$J$ models. We use Boundary Conformal Field Theory and the Bethe Ansatz solutions of these models with both periodic and open boundary conditions to calculate the exponents describing the power-law decay near the edges of X-ray absorption spectra in the case where the core-hole potential has bound states.

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