Giant magnetoresistance of multiwall carbon nanotubes: Modeling the tube/ferromagnetic-electrode burying contact

Krompiewski, Stefan ; Gutiérrez, Rafael ; Cuniberti, Gianaurelio

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Date of publication of this fulltext: 05 Aug 2009 13:31

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Details

Item type:	Article
Journal or Publication Title:	Physical Review B
Volume:	69
Page Range:	p. 155423
Date:	2004
Institutions:	Physics > Institute of Theroretical Physics > Alumni or Retired Professors > Group Gianaurelio Cuniberti
Projects:	Graduiertenkolleg Nichtlinearität und Nichtgleichgewicht, Volkswagen Stiftung: Molecular Computing
Identification Number:	Value Type 10.1103/PhysRevB.69.155423 DOI
Dewey Decimal Classification:	500 Science > 530 Physics
Status:	Published
Refereed:	Yes, this version has been refereed
Created at the University of Regensburg:	Yes
Item ID:	1735

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Abstract

We report on the giant magnetoresistance (GMR) of multiwall carbon nanotubes with ultra small diameters. In particular, we consider the effect of the inter-wall interactions and the lead/nanotube coupling. Comparative studies have been performed to show that in the case when all walls are well coupled to the electrodes, the so-called inverse GMR can appear. The tendency towards a negative GMR ...

Abstract

We report on the giant magnetoresistance (GMR) of multiwall carbon nanotubes with ultra small diameters. In particular, we consider the effect of the inter-wall interactions and the lead/nanotube coupling. Comparative studies have been performed to show that in the case when all walls are well coupled to the electrodes, the so-called inverse GMR can appear. The tendency towards a negative GMR depends on the inter-wall interaction and on the nanotube le ngth. If, however, the inner nanotubes are out of contact with one of the electrodes, the GMR remains positive even for relatively strong inter-wall interactions regardless of the outer nanotube length. These results shed additional light on recently reported experimental data, where an inverse GMR was found in some multiwall carbon nanotube samples.

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Metadata last modified: 04 Jun 2018 14:46

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