Electromechanical responses of single-walled carbon nanotubes: Interplay between the strain-induced energy-gap opening and the pinning of the Fermi level
Journal
Journal of Applied Physics
Journal Volume
98
Journal Issue
4
Date Issued
2005
Author(s)
Abstract
A comprehensive picture of electromechanical responses of carbon single-walled nanotubes (SWNTs) is obtained using ab initio density-functional theory and self-consistent π -orbital Hamiltonian. We find a linear behavior of the energy gap of zigzag SWNTs as a function of the axial strain with different slopes for compression versus extension. Observed small changes in conductance even with a substantial energy gap due to the strain is attributed to the pinning of the Fermi level near the top of the valence band. © 2005 American Institute of Physics.
SDGs
Other Subjects
Electromechanical responses; Energy gaps; Linear behavior; Single-walled nanotubes (SWNT); Fermi level; Hamiltonians; Linear systems; Probability density function; Carbon nanotubes
Type
journal article