Nonlinear high-frequency hopping conduction in two-dimensional arrays of Ge-in-Si quantum dots: Acoustic methods

I. L. Drichko; A. M. Diakonov; V. A. Malysh; I. Yu. Smirnov; E. S. Koptev; A. I. Nikiforov; N. P. Stepina; Y. M. Galperin; J. Bergli

doi:10.1016/j.ssc.2012.02.016

Nonlinear high-frequency hopping conduction in two-dimensional arrays of Ge-in-Si quantum dots: Acoustic methods

Mesoscale and Nanoscale Physics 2012-03-16 v1

Authors: I. L. Drichko , A. M. Diakonov , V. A. Malysh , I. Yu. Smirnov , E. S. Koptev , A. I. Nikiforov , N. P. Stepina , Y. M. Galperin , J. Bergli

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Using acoustic methods we have measured nonlinear AC conductance in 2D arrays of Ge-in-Si quantum dots. The combination of experimental results and modeling of AC conductance of a dense lattice of localized states leads us to the conclusion that the main mechanism of AC conduction in hopping systems with large localization length is due to the charge transfer within large clusters, while the main mechanism behind its non-Ohmic behavior is charge heating by absorbed power.

Keywords

hopping conduction quantum dots nonlinear AC conductance acoustic methods charge heating localized states

Cite

@article{arxiv.1203.3285,
  title  = {Nonlinear high-frequency hopping conduction in two-dimensional arrays of Ge-in-Si quantum dots: Acoustic methods},
  author = {I. L. Drichko and A. M. Diakonov and V. A. Malysh and I. Yu. Smirnov and E. S. Koptev and A. I. Nikiforov and N. P. Stepina and Y. M. Galperin and J. Bergli},
  journal= {arXiv preprint arXiv:1203.3285},
  year   = {2012}
}

Comments

5 pages, 7 figures

Nonlinear high-frequency hopping conduction in two-dimensional arrays of Ge-in-Si quantum dots: Acoustic methods

Abstract

Keywords

Cite

Comments

Related papers