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Critical properties in photoemission spectra for the one-dimensional Mottinsulator with orbital degeneracy are studied by exploiting the integrable {\itt-J} model, which is a supersymmetric generalization of the SU($n$) degeneratespin model. We discuss the critical properties for the holon dispersion as wellas the spinon dispersions, by applying the conformal field theory analysis tothe exact finite-size energy spectrum. We study the effect of orbital-splittingon the spectra by evaluating the momentum-dependent critical exponents.Comment: 8 pages, REVTeX, 2 figures(available upon request), accepted for  publication in JPSJ 68 (1999) No.

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