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Spontaneous polarization and piezoelectric constants of III-V nitrides

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      Abstract

      The spontaneous polarization, dynamical Born charges, and piezoelectric constants of the III-V nitrides AlN, GaN, and InN are studied ab initio using the Berry phase approach to polarization in solids. The piezoelectric constants are found to be up 10 times larger than in conventional III-V's and II-VI's, and comparable to those of ZnO. Further properties at variance with those of conventional III-V compounds are the sign of the piezoelectric constants (positive as in II-VI's) and the very large spontaneous polarization.

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            Author and article information

            Journal
            cond-mat/9705105
            10.1103/PhysRevB.56.R10024

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