Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1860788 | Physics Letters A | 2016 | 5 Pages |
•An exact analysis is given for interacting rings with spinless fermions.•MI transition is obtained at half-filling.•Conducting properties are estimated by calculating Drude weight.
We calculate persistent current of one-dimensional rings of fermions neglecting the spin degrees of freedom considering only nearest-neighbor Coulomb interactions with different electron fillings in both ordered and disordered cases. We treat the interaction exactly and find eigenenergies by exact diagonalization of many-body Hamiltonian and compute persistent current by numerical derivative method. We also determine Drude weight to estimate the conducting nature of the system. From our numerical results, we obtain a metal–insulator transition in half-filled case with increasing correlation strength U but away from half-filling no such transition is observed even for large U.