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Sagnac Interference in Carbon Nanotube Loops

Refael, Gil and Heo, Jinseong and Bockrath, Marc (2007) Sagnac Interference in Carbon Nanotube Loops. Physical Review Letters, 98 (24). Art. No. 246803. ISSN 0031-9007. doi:10.1103/PhysRevLett.98.246803.

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In this Letter we study electron interference in nanotube loops. The conductance as a function of the applied voltage is shown to oscillate due to interference between electron beams traversing the loop in two opposite directions, with slightly different velocities. The period of these oscillations with respect to the gate voltage, as well as the temperatures required for the effect to appear, are shown to be much larger than those of the related Fabry-Perot interference. We calculate interaction effects on the period of the oscillations, and show that even though interactions destroy much of the near degeneracy of velocities in the symmetric spin channel, the slow interference effects survive.

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Additional Information:©2007 The American Physical Society (Received 22 August 2006; published 15 June 2007) We are grateful to J. von Delft and Y. Oreg for a critical discussion, and to L. Balents, E. Demler, D. Feldman, V. Galitski, and J. Meyer for helpful comments. This research was supported in part by the National Science Foundation under Grant No. PHY05-51164.M.B. and J.H. are grateful to support by the ONR.
Issue or Number:24
Record Number:CaltechAUTHORS:REFprl07b
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8454
Deposited By: Archive Administrator
Deposited On:14 Aug 2007
Last Modified:08 Nov 2021 20:50

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