Nanotube Piezoelectricity

Details Nanotube Piezoelectricity Nanotube Piezoelectricity

2003-08-27

arxiv.org/abs/cond-mat/0308583v1

Phys. Rev. B 68, 241405(R) (2003)

Physics

Condensed Matter

Materials Science

4 pages, with 3 postscript figures embedded. Uses REVTEX4 macros. Also available at http://www.physics.upenn.edu/~nsai/prepr

Scientific paper

10.1103/PhysRevB.68.241405

We combine ab initio, tight-binding methods and analytical theory to study piezoelectric effect of boron nitride nanotubes. We find that piezoelectricity of a heteropolar nanotube depends on its chirality and diameter and can be understood starting from the piezoelectric response of an isolated planar sheet, along with a structure specific mapping from the sheet onto the tube surface. We demonstrate that coupling between the uniaxial and shear deformation are only allowed in the nanotubes with lower chiral symmetry. Our study shows that piezoelectricity of nanotubes is fundamentally different from its counterpart in three dimensional (3D) bulk materials.

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