Large size two-hole bound states in t-J model
M. Yu. Kuchiev, O. P. Sushkov
Abstract
Several series of shallow large-size (l lattice~ spacing) two-hole bound states are found in the two-dimensional t-J model. Their binding energies depend exponentially on the inverse value of the hole-spin-wave coupling constant. Their parity is connected with the angular wave function in a nonstandard way. The possible role of these states in the formation of superconducting pairing is considered.
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