Collective Effects and Some Response Characteristics

Abstract

A crystal with a center of symmetry cannot be piezoelectric [1]. Thus, the diamond-type crystals (diamond, Si, Ge and a-Sn) cannot be piezoelectric. Tables 5.1 and 5.2 summarize the piezoelectric constants for some A N B 8ÀN tetrahedral semiconductors with cubic and hexagonal crystal structures, respectively. Note that the piezoelectric strain constant d ij is connected reciprocally with the stress constant e ik in the following manner Properties of Semiconductor Alloys: Group-IV, III-V and II-VI Semiconductors Sadao Adachi