Carbon nanotube in a threading magnetic field: Conductance oscillations persistent current and magnetization

Abstract

987752The magnetic response of electrons in a zigzag carbon nanotube (CN) threaded by an Aharonov Bohm flux f is carefully analyzed by using a Hartree Fock approximation. The ground state energy as a function of the magnetic field, B, and the electron-electron repulsion strength, U, are obtained for N e interacting electrons confined in short ($100 nm) and long ($1 mm) CNs. The spin and orbital magnetization responses to the magnetic field variations are discussed. The CN transport properties are investigated and periodic field dependent oscillations are predicted for both longitudinal ballistic and persistent currents. The behavior of persistent current is investigated as a function of U and a significant suppression in current amplitude is observed when the strength of the electron-electron repulsion increases.

Manipulation of circular currents in a coupled ring system: effects of connectivity and non-uniform disorder

“…Figure13. Circular current and the induced magnetic eld in ring-II as a function of disorder for the ODS two-ring system with 12 atomic sites, when the rings are connected via two bonds.…”