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Quantum pumps formed of double walled carbon nanotubes

Research output: Contribution to journalJournal article

Published

Journal publication date1/12/2009
JournalPhysica Status Solidi (B)
Journal number11-12
Volume246
Number of pages4
Pages2650-2653
Original languageEnglish

Abstract

Using the Brouwer formula, we employ Green's function technique to study charge pumping in shuttle geometry double walled carbon nanotubes. We find strong chirality dependence, and that there is virtually no pumping if the chiral angle of the two walls is the same. We discuss which are the optimal chiralities that can be used for such quantum pumps. Furthermore, we argue that charge pumping with double walled tubes can be used to probe the strength of the inter-layer coupling between the inner and outer nanotube.

Bibliographic note

23rd Winterschool on Electronic Properties of Novel Materials, Kirchberg, GERMANY, MAR 14, 2009