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FIZIKA A 7 (1998) 2, 75-80
LETTER TO THE EDITOR FORMATION OF BIPOLARONS: A SMALL-CLUSTER STUDYŽELJKO CRLJEN Department of Theoretical Physics, Ruđer Bošković Institute, P.O. Box 1016, 10 000 Zagreb, Croatia Received 30 December 1997; revised manuscript received 21 May 1998; Accepted 24 June 1998The effect of electron-phonon coupling on the formation of bipolarons is considered in both adiabatic and antiadiabatic regimes. Within the two-site Holstein-Hubbard model, it is shown that fast phonons can influence the formation for both repulsive and attractive effective on-site interactions. PACS numbers: 71.38.+i, 63.20.Kr
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Copyright by The Croatian Physical Society
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