Allsopp, N. K. and Lambert, Colin (1994) Coherent transport through a T-shaped mesoscopic superconducting junction. Physical Review B, 50 (6). pp. 3972-3976. ISSN 1098-0121Full text not available from this repository.
We highlight a ''transverse'' interference effect, arising from the coupling between electrons and holes, induced by a superconducting island in contact with a normal metal. As an example we compute the electrical conductance G of a T-shaped mesoscopic sample, formed by joining a horizontal bar of normal metal to a vertical leg of the same material. With a superconducting island located on the vertical leg and the current flowing horizontally, we examine the dependence of G on the distance L of the island from the horizontal bar. Of particular interest is the differential conductance G (E) at an applied voltage E = Ev, which due to quantum interference between electrons and Andreev reflected holes, is predicted to oscillate with both L and E. For a system with a spherical Fermi surface, the period of oscillation with E is piE(F)/k(F)L and with L is piE(F)/k(F)E, where E(F) is the Fermi energy and k(F) the Fermi wave vector.
|Journal or Publication Title:||Physical Review B|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited On:||24 Oct 2012 14:26|
|Last Modified:||07 Jan 2015 17:52|
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