Eur. Phys. J. B (2015) 88: 171
https://doi.org/10.1140/epjb/e2015-60216-1

Regular Article

Ballistic transport in nanowires through non-magnetic or magnetic cavity

¹ Faculty of Education, Art, and Science, Yamagata University, 990-8560 Yamagata, Japan
² Department of Creative Technology Engineering, National Institute of Technology, Anan College, Anan, 774-0017 Tokushima, Japan

^a e-mail: nonoyama@e.yamagata-u.ac.jp

Received: 17 March 2015
Received in final form: 20 May 2015
Published online: 6 July 2015

Abstract

Ballistic transport phenomena through a region containing a cavity in a quasi-one-dimensional quantum nanowire are investigated. Conductance curves calculated as a function of a structural parameter show quantum interference effects on transport clearly. In a special geometry, very narrow periodic dips, which are attributable to the anti-resonance, appear on the conductance curve. The nature of the virtual bound state resulting in the anti-resonance is studied in detail. Electron conductions through a small dilute magnetic semiconductor are also investigated.