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

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

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/148700

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9702234
 http://arxiv.org/abs/cond-mat/9702234
 Phys. Rev. B56 (1997) 6631-6641
 doi:10.1103/PhysRevB.56.6631

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arXiv