Geodesic
Elementary excitations in the dimerized Hubbard model
Teoretičeskaâ i matematičeskaâ fizika, Tome 71 (1987) no. 3, pp. 457-463

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Dimerized Hubbard model with one electron per dimer is considered. The spectrum of electron and magnon excitations is calculated in the limit of strong electron-electron correlations with the help of the diagram method with respect to the inter-dimer hopping integral. The values of the dimer gap and effective exchange integral are found. 
@article{TMF_1987_71_3_a15,
     author = {A. V. Vedyaev and M. E. Zhuravlev and V. A. Ivanov},
     title = {Elementary excitations in the dimerized {Hubbard} model},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {457--463},
     publisher = {mathdoc},
     volume = {71},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1987_71_3_a15/}
}
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A. V. Vedyaev; M. E. Zhuravlev; V. A. Ivanov. Elementary excitations in the dimerized Hubbard model. Teoretičeskaâ i matematičeskaâ fizika, Tome 71 (1987) no. 3, pp. 457-463. http://geodesic.mathdoc.fr/item/TMF_1987_71_3_a15/