Spontaneous polarization and piezoelectricity in boron nitride nanotubes
Abstract
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 intertube interaction or elastic deformations induces spontaneous polarization comparable to those of wurtzite semiconductors.
- Publication:
-
Physical Review B
- Pub Date:
- June 2003
- DOI:
- 10.1103/PhysRevB.67.235406
- arXiv:
- arXiv:cond-mat/0305329
- Bibcode:
- 2003PhRvB..67w5406N
- Keywords:
-
- 73.22.-f;
- 77.65.-j;
- 77.70.+a;
- 85.35.Kt;
- Electronic structure of nanoscale materials: clusters nanoparticles nanotubes and nanocrystals;
- Piezoelectricity and electromechanical effects;
- Pyroelectric and electrocaloric effects;
- Nanotube devices;
- Condensed Matter - Materials Science
- E-Print:
- 5 pages in PRB double column format, 3 figures