Slow relaxation of piezoelectric response in CdZnTe ferroelectric semiconductor single crystals

Shanming Ke, Haitao Huang, Tao Wang, Huiqing Fan, Waiqi Jie, H. L.W. Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

The piezoelectric response in Cd0.9 Zn0.1 Te (CZT) semiconductor single crystals has been investigated by analyzing room temperature impedance spectra. The polarization is significantly influenced by light illumination. A slow relaxation process of the piezoelectric response has been observed with a relaxation time of 37 s, which is comparable to the discharge current results. The frequencies for piezoelectric resonance and antiresonance can be tuned to lower values when a bias field is applied and can be recovered when the bias field is removed. These phenomena may be universal for ferroelectric semiconductors and can be explained by a slow relaxation model in dielectrics.
Original languageEnglish
Article number162901
JournalApplied Physics Letters
Volume91
Issue number16
DOIs
Publication statusPublished - 31 Oct 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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