Geodesic
Bound magnon-exciton states
Teoretičeskaâ i matematičeskaâ fizika, Tome 22 (1975) no. 3, pp. 412-417

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The problem of bound magnon-exciton states in one-dimensional chain is solved in the model proposed by Ueno and Oguchi [5]. It is shown, that one or two bound states can exist. Critical values of the parameters, at which the embedding into continuous spectrum takes place, are found. Some numerical results of [5] are not in accordance with those obtained here. 
@article{TMF_1975_22_3_a12,
     author = {I. G. Gochev},
     title = {Bound magnon-exciton states},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {412--417},
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1975_22_3_a12/}
}
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I. G. Gochev. Bound magnon-exciton states. Teoretičeskaâ i matematičeskaâ fizika, Tome 22 (1975) no. 3, pp. 412-417. http://geodesic.mathdoc.fr/item/TMF_1975_22_3_a12/