Critical Properties in Photoemmision Spectra for One Dimensional Orbitally Degenerate Mott Insulator

Details Critical Properties in Photoemmision Spectra for One Dimensional Orbitally Degenerate Mott Insulator Critical Properties in Photoemmision Spectra for One Dimensional Orbitally Degenerate Mott Insulator

1998-11-13

arxiv.org/abs/cond-mat/9811189v1

Physics

Condensed Matter

8 pages, REVTeX, 2 figures(available upon request), accepted for publication in JPSJ 68 (1999) No.1

Scientific paper

10.1143/JPSJ.68.151

Critical properties in photoemission spectra for the one-dimensional Mott insulator with orbital degeneracy are studied by exploiting the integrable {\it t-J} model, which is a supersymmetric generalization of the SU($n$) degenerate spin model. We discuss the critical properties for the holon dispersion as well as the spinon dispersions, by applying the conformal field theory analysis to the exact finite-size energy spectrum. We study the effect of orbital-splitting on the spectra by evaluating the momentum-dependent critical exponents.

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