## Abstract

Piezoelectric coefficients of zinc blende (ZB) InN, GaN, and AlN have been estimated from the piezoelectric coefficients of the wurtzite (WZ) system. This procedure is based on a rotation of the first-order piezoelectric tensor of a (001)-oriented ZB structure to a (111)-oriented ZB structure, which is similar to a WZ structure. The derived expressions for the piezoelectric coefficients in a (111)-oriented ZB system are benchmarked against literature coefficients of different WZ materials, showing a very good agreement. To perform the desired opposite operation, a least square fitting procedure was used to find the ZB piezoelectric coefficient e _{14} that provides the closest reverse transformation to the known WZ constants. Using e _{14}, the piezoelectric potential in a GaN/AlN QD is calculated and compared to a InAs/GaAs QD, revealing a much larger potential in the nitride system, even though the lattice mismatch is much smaller in this system. The result is related to the large piezoelectric coefficient e _{14} in ZB nitride materials.

Original language | English |
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Pages (from-to) | 521-525 |

Number of pages | 5 |

Journal | PHYSICA STATUS SOLIDI B: BASIC SOLID STATE PHYSICS |

Volume | 249 |

Issue number | 3 |

DOIs | |

Publication status | Published - Mar 2012 |

MoE publication type | A1 Journal article-refereed |

## Keywords

- Built-in fields
- Nitrides
- Piezoelectric coefficients
- Quantum dots
- Zinc blende