"Comb-Like" Polarons and Bipolarons in High-Tc Materials |
| E.M. Hankiewicz, R. Buczko and Z. Wilamowski Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland |
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| Diagonalization of Hamiltonian composed from d-d exchange interactions between localized d spins of antiferromagnetic cluster and p-d interaction with the spin of carriers indicates a possibility of formation of pure magnetic polarons. The most energetically favorable solution occurs when the carrier density in CuO2 planes is distributed on every second spin. These "comb-like" polarons have a tendency to bind into pairs (bipolarons) "glued" by the antiferromagnetic medium. |
| DOI: 10.12693/APhysPolA.97.185 PACS numbers: 74.20.-z, 75.10.-b, 74.20.Mn |