2 papers
cond-mat1996
Gutzwiller Approximation in Degenerate Hubbard Models
Jian Ping Lu
Degenerate Hubbard models are studied using the Generalized-Gutzwiller-Approximation. It is found that the metal-insulator transition occurs at a finite correlation when the…
cond-mat1994
Novel Magnetic Properties of Carbon Nanotubes
Jian Ping Lu
An external magnetic field is found to have strong effects on the electronic structure of carbon nanotubes. A field-induced metal-insulator transition is predicted for all pure nan…