Metal-insulator transition in an one-dimensional half-filled interacting mesoscopic ring with spinless fermions: Exact results

Authors

Madhumita Saha, Indian Statistical Institute, Kolkata
Santanu K. Maiti, Indian Statistical Institute, Kolkata

Article Type

Research Article

Publication Title

Physics Letters, Section A: General, Atomic and Solid State Physics

Abstract

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.

First Page

1450

Last Page

1454

DOI

10.1016/j.physleta.2016.02.022

Publication Date

4-1-2016

Comments

Open Access; Green Open Access

Recommended Citation

Saha, Madhumita and Maiti, Santanu K., "Metal-insulator transition in an one-dimensional half-filled interacting mesoscopic ring with spinless fermions: Exact results" (2016). Journal Articles. 4298.
https://digitalcommons.isical.ac.in/journal-articles/4298