Two holes in the t-J model form a bound state for any nonzero J/t

Two Holes in the t–J Model Form a Bound State for Any Nonzero J/t

Study of the two-hole bound state in the t-J model including a short-range hole-hole Coulomb repulsion

Bound state of two holes in the t-J model

Large-size two-hole bound states in the t-J model

Long-range two-hole bound states in t-J model

On the origin of the unconventional two-hole bound state in the t-J model