The Hubbard model: useful for stretchable nano-materials?

The aim of this lecture is to test the consequences of stretching and doping on the electrical conductivity of the Hubbard model. It is motivated by a recent experiment in which conductivity of stretchable nanomaterials was studied,and which showed that conductivity tends to zero but remains finite for considerable values of the strain. The Hubbard model reproduces such behavior for certain values of the parameters,and for the hopping,band filling and lattice ''constant dependent on the strain.