Chin. J. Semicond. > 2007, Volume 28 > Issue 1 > 42-46

PAPERS

Strain Distribution and Piezoelectric Effect in GaN/AlN Quantum Dots

Liang Shuang and Lu Yanwu

+ Author Affiliations

PDF

Abstract: An effective method is introduced to investigate the strained fields and piezoelectric effect in GaN/AlN quantum dots (QDs) with hexagonal truncated pyramid shape.The strain distribution and charge density were calculated using the finite element method (FEM).It is shown that spontaneous and piezoelectric polarization resulted in the separation of electrons and holes,bringing about a strong built-in electric field in the QD structures.The strain field and piezoelectric potential influence the distribution of charges.The electrons are localized near the top of the QDs,and the holes are localized in the wetting layer just below the pyramid.Furthermore,the piezoelectric potential in the QDs affects the electron levels and band edge shape.

Key words: GaN/AlN quantum dotstrainspontaneous polarizationpiezoelectric polarization

  • Search

    Advanced Search >>

    Article Metrics

    Article views: 3478 Times PDF downloads: 1336 Times Cited by: 0 Times

    History

    Received: 18 August 2015 Revised: 20 September 2006 Online: Published: 01 January 2007

    Catalog

      Email This Article

      User name:
      Email:*请输入正确邮箱
      Code:*验证码错误
      Liang Shuang, Lu Yanwu. Strain Distribution and Piezoelectric Effect in GaN/AlN Quantum Dots[J]. Journal of Semiconductors, 2007, In Press. Liang S, Lu Y W. Strain Distribution and Piezoelectric Effect in GaN/AlN Quantum Dots[J]. Chin. J. Semicond., 2007, 28(1): 42.Export: BibTex EndNote
      Citation:
      Liang Shuang, Lu Yanwu. Strain Distribution and Piezoelectric Effect in GaN/AlN Quantum Dots[J]. Journal of Semiconductors, 2007, In Press.

      Liang S, Lu Y W. Strain Distribution and Piezoelectric Effect in GaN/AlN Quantum Dots[J]. Chin. J. Semicond., 2007, 28(1): 42.
      Export: BibTex EndNote

      Strain Distribution and Piezoelectric Effect in GaN/AlN Quantum Dots

      • Received Date: 2015-08-18
      • Accepted Date: 2006-07-21
      • Revised Date: 2006-09-20
      • Published Date: 2006-12-26

      Catalog

        /

        DownLoad:  Full-Size Img  PowerPoint
        Return
        Return