2003/02/28 by Colin Benjamin, A. M. Jayannavar
Physics and Astronomy · #Quantum and electron transport phenomena #Quantum optics and atomic interactions #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.68.085325
published as Phys. Rev. B 68, 085325 (2003) · 7 pages, 7 figures. Minor changes made. Accepted for publication in Phys. Rev. B
arxiv created 2003/07/03 · openalex publication_date 2003/08/25 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this work we analyze an Aharonov-Bohm interferometer in the tunneling regime. In this regime, a 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 the revival of the current magnification. Systematics in magnetoconductance oscillations are observed in this evanescent wave geometry. In this framework we also see absence of Fano line shapes in transmission resonances but once again one can recover these if the direct path supports propagating modes.