Geodesic
Phase transitions in one-dimensional Hubbard model with degeneracy
Teoretičeskaâ i matematičeskaâ fizika, Tome 67 (1986) no. 3, pp. 470-473 
A. V. Vedyaev; M. E. Zhuravlev; V. A. Ivanov. Phase transitions in one-dimensional Hubbard model with degeneracy. Teoretičeskaâ i matematičeskaâ fizika, Tome 67 (1986) no. 3, pp. 470-473. http://geodesic.mathdoc.fr/item/TMF_1986_67_3_a11/
@article{TMF_1986_67_3_a11,
     author = {A. V. Vedyaev and M. E. Zhuravlev and V. A. Ivanov},
     title = {Phase transitions in one-dimensional {Hubbard} model with degeneracy},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {470--473},
     year = {1986},
     volume = {67},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1986_67_3_a11/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

A solution in quadratures of the doubly orbitally degenerate Hubbard chain with strong correlations of the electrons in one orbital is obtained by means of the spin-symmetrized Bethe–Gaudin–Yaug ansatz. The correlation gap in the dielectric phase is due to both interorbital Coulomb repulsion of the electrons and their Hund exchange interaction. The possibilities of a Mort transition are investigated.

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