Second bound state of the positronium molecule and biexcitons
arXiv:cond-mat/9802261 · doi:10.1103/PhysRevLett.80.1876
Abstract
A new, hitherto unknown bound state of the positronium molecule, with orbital angular momentum L=1 and negative parity is reported. This state is stable against autodissociation even if the masses of the positive and negative charges are not equal. The existence of a similar state in two-dimension has also been investigated. The fact that the biexcitons have a second bound state may help the better understanding of their binding mechanism.
Latex, 8 pages, 2 Postscript figures