Physics – Condensed Matter
Scientific paper
1998-11-13
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.
Fujii Takenori
Kawakami Norio
Tsukamoto Yasuyuki
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