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1995 | 88 | 4 | 779-782
Article title

Effect in Coherently Strained B-Doped (001)SiGe/Si Heterostructures

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EN
Abstracts
EN
We report on two methods which illustrate piezoelectric effects in the strained Si (100)Si_{1-x}/Ge_{x} system. The non-contact sound excitation tech­nique has been used to reveal the conversion of a high-frequency electric field E into acoustic waves at 77 K which can also be modulated by a dc applied bias voltage (±30 V). The sample was an MBE grown modulation doped Si_{0.88}Ge_{0.12}/(001)Si structure with a carrier sheet density 2.0 × 10^{11} cm^{-2} and a 4.2 K mobility 10500 cm^{2} V^{-1} s^{-1}. We deduce that the observed high-frequency electric field acoustic wave conversion is associated with a piezoelectric-like effect possibly due to ordering in the strained SiGe alloy or symmetry breaking effect near Si/SiGe interface. Further evidence is pro­vided by the existence of a piezoelectric phonon interaction in the hot hole energy relaxation mechanism determined from high electric field Shubnikov de Haas He^{3} low temperature measurements.
Keywords
Publisher

Year
Volume
88
Issue
4
Pages
779-782
Physical description
Dates
published
1995-10
Contributors
author
  • Institute of Radiophysics and Electronics, National Academy of Sciences of Ukraine, 12, Acad. Proscura st., Kharkov, 310085, Ukraine
author
  • Institute of Radiophysics and Electronics, National Academy of Sciences of Ukraine, 12, Acad. Proscura st., Kharkov, 310085, Ukraine
  • Institute of Radiophysics and Electronics, National Academy of Sciences of Ukraine, 12, Acad. Proscura st., Kharkov, 310085, Ukraine
  • Department of Physics, University of Warwick, Coventry, CV4 7AL, UK
author
  • Department of Physics, University of Warwick, Coventry, CV4 7AL, UK
author
  • Department of Physics, University of Warwick, Coventry, CV4 7AL, UK
author
  • Department of Physics, University of Warwick, Coventry, CV4 7AL, UK
References
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv88z440kz
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