Large size two-hole bound states in t-J model
arXiv:cond-mat/9403044 · doi:10.1016/0921-4534(93)90283-V
Abstract
Several series of shallow large-size ($l \gg lattice~ spacing$) 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.
23 pages, REVTEX 3.0, 6 PostScript pictures appended, Physica C 218 (1993) 197-207