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Tuning Carbon Nanotube Band Gaps with Strain

E. D. Minot, Yuval Yaish, Vera Sazonova, Ji-Yong Park, Markus Brink, and Paul L. McEuen
Phys. Rev. Lett. 90, 156401 – Published 15 April 2003
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Abstract

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 band gap in a metallic NT and modify the band gap in a semiconducting NT. Theoretical work predicts that band gap changes can range between ±100meV per 1% stretch, depending on NT chirality, and our measurements are consistent with this predicted range.

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  • Received 6 November 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.156401

©2003 American Physical Society

Authors & Affiliations

E. D. Minot, Yuval Yaish, Vera Sazonova, Ji-Yong Park, Markus Brink, and Paul L. McEuen

  • Laboratory of Atomic and Solid-State Physics, Cornell University, Ithaca, New York 14853

See Also

Nanotubes Under Stress

Lea Winerman
Phys. Rev. Focus 11, 15 (2003)

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Issue

Vol. 90, Iss. 15 — 18 April 2003

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