Features in Evanescent Aharonov-Bohm interferometry

Abstract

In this work we analyze an Aharonov-Bohm interferometer in the tunneling regime. In this regime, current magnification effect which arises in presence of transport currents is absent. A slight modification in the form of a quantum well incorporated in one of the arms leads to revival of current magnification. Systematics in magneto-conductance oscillations are observed in this evanescent wave geometry. In this framework we also see absence of Fano lineshapes in transmission resonances but once again one can recover these if the direct path supports propagating modes.

7 pages, 7 figures. Minor changes made. Accepted for publication in Phys. Rev. B

References in corpus (8)

• Tuning of the Fano Effect through a Quantum Dot in an Aharonov-Bohm Interferometer
• Fano resonances as a probe of phase coherence in quantum dots
• Effects of broken time-reversal symmetry on transmission zeros in the Aharonov-Bohm interferometer
• Dephasing via stochastic absorption: A case study in Aharonov-Bohm oscillations
• Current magnification effect in mesoscopic systems at equilibrium
• Persistent currents in coupled mesoscopic rings
• Directional dependence of spin currents induced by Aharonov-Casher phase
• Aharonov-Bohm effect in the presence of evanescent modes

Cited by in corpus (5)

• Connecting wave functions at a three-leg junction of one-dimensional channels
• Hartman effect and non-locality in quantum networks
• Hartman effect in presence of Aharanov Bohm flux
• Exotic electron states and tunable magneto-transport in a fractal Aharonov-Bohm interferometer
• Large diamagnetic persistent currents