Fibonacci-Hubbard chain at zero and finite temperatures

We have studied finite-sized single band Hubbard chains with Fibonacci modulation for half-filling within a mean field approximation. The ground state properties, together with the DC conductivity both at zero and non-zero temperatures, are calculated for such quasiperiodic Hubbard chains. While a reduction in the conductivity is found due to strong electronic interaction or strong Fibonacci modulation, a competition between these two is observed to enhance the conductivity. The results at finite temperatures also illustrate some interesting features of such finite-sized systems.