Tuning carbon nanotube bandgaps with strain

Tuning carbon nanotube bandgaps with strain

We show that the band structure of a carbon nanotube (NT) can be dramatically altered by mechanical strain. We employ an atomic force microscope tip to simultaneously vary the NT strain and to electrostatically gate the tube. We show that strain can open a bandgap in a metallic NT and modify the ban...

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Bibliographic Details
Main Authors: Minot, E. D, Yaish, Yuval, Sazonova, Vera, Park, Ji-Yong, Brink, Markus, McEuen, Paul L
Format: Journal Article
Language:English
Published: 08-11-2002
Subjects:
Physics - Materials Science
Physics - Mesoscale and Nanoscale Physics
Online Access:Get full text
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Summary:We show that the band structure of a carbon nanotube (NT) can be dramatically altered by mechanical strain. We employ an atomic force microscope tip to simultaneously vary the NT strain and to electrostatically gate the tube. We show that strain can open a bandgap in a metallic NT and modify the bandgap in a semiconducting NT. Theoretical work predicts that bandgap changes can range between +100meV and -100meV per 1% stretch, depending on NT chirality, and our measurements are consistent with this predicted range.
DOI:10.48550/arxiv.cond-mat/0211152