Doing Physics:

Physica C paper.

The excitation energy spectrum for a system with electron pairs tunneling in a two-leg ladder has a doping depended gap (also at

The existence of a quantum phase transition in a Hubbard model on a square lattice.

In a search for a “simple” model of HTSC

P.S. You can find more at researchgate or or

P.P.S. I understand that for a mature physicist my papers might bring forth feelings, I experience sometimes when reading what a mature physicist writes about teaching :)

P.P.P.S. Statistics on March 10th 2015 => not bad for a guy who has no formal education in English