Features in Evanescent Aharonov-Bohm interferometry

Details Features in Evanescent Aharonov-Bohm interferometry Features in Evanescent Aharonov-Bohm interferometry

2003-02-08

arxiv.org/abs/cond-mat/0302160v2

Phys. Rev. B 68, 085325 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

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

Scientific paper

10.1103/PhysRevB.68.085325

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.

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