Spontaneous polarization and piezoelectricity in boron nitride nanotubes

Details Spontaneous polarization and piezoelectricity in boron nitride nanotubes Spontaneous polarization and piezoelectricity in boron nitride nanotubes

2003-05-14

arxiv.org/abs/cond-mat/0305329v1

Phys. Rev. B 67, 235406 (2003)

Physics

Condensed Matter

Materials Science

5 pages in PRB double column format, 3 figures

Scientific paper

10.1103/PhysRevB.67.235406

Ab initio calculations of the spontaneous polarization and piezoelectric properties of boron nitride nanotubes show that they are excellent piezoelectric systems with response values larger than those of piezoelectric polymers. The intrinsic chiral symmetry of the nanotubes induces an exact cancellation of the total spontaneous polarization in ideal, isolated nanotubes of arbitrary indices. Breaking of this symmetry by inter-tube interaction or elastic deformations induces spontaneous polarization comparable to those of wurtzite semiconductors.

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