Chiral effects in normal and superconducting carbon nanotube-based nanostructures

Физика Низких Температур: Том 36, Выпуск 10-11 (Октябрь 2010), c. 1193-1203 ( к оглавлению , назад )

Chiral effects in normal and superconducting carbon nanotube-based nanostructures

A.V. Parafilo¹, I.V. Krive^1,2,3, E.N. Bogachek⁴, U. Landman⁴, R.I. Shekhter², and M. Jonson^2,5,6

¹B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: krive@ilt.kharkov.ua

²Department of Physics, University of Gothenburg, Göteborg SE-412 96, Sweden

³Physical Department, V.N. Karazin National University, Kharkov 61077, Ukraine

⁴School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, USA

⁵School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK

⁶Division of Quantum Phases and Devices, School of Physics, Konkuk University, Seoul 143-701, Korea

Received May 6, 2010

Abstract

The novel phenomenon of chiral tunneling in metallic single-wall carbon nanotubes is considered. It is induced by the interplay of electrostatic and pseudomagnetic effects in electron scattering in chiral nanotubes and is characterized by the oscillatory dependence of the electron transmission probability on nanotube chiral angle and the strength of the scattering potential. The appearance of a special (Aharonov–Bohm-like) phase in chiral tunneling affects various phase-coherent phenomena in nanostructures. We considered chiral effects in: (i) the persistent current in a circular nanotube, (ii) the Josephson current in a nanotube-based SNS junction, and (iii) resonant electron tunneling through a chiral nanotube-based quantum dot.

PACS: 73.23Ra Persistent currents;
PACS: 72.10.–d Theory of electronic transport; scattering mechanisms;
PACS: 74.50.+r Tunneling phenomena; Josephson effects.

Key words: chiral tunneling, persistent currents, Josephson current, carbon nanotube.

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