کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9588611 1506643 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Conductivity of two-dimensional crystals over liquid helium for different holding fields
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Conductivity of two-dimensional crystals over liquid helium for different holding fields
چکیده انگلیسی
The results are presented of the experimental study of electron crystals over liquid helium with surface electron density of 3.2×108 and 6.4×108 cm−2 (melting temperatures 0.4 and 0.58 K) at temperature 83 mK and for holding electric fields 300-1200 V/cm. The measurements are performed in the frequency range 1-14 MHz where the coupled phonon-ripplon resonances are observed in the experimental cell. The real and imaginary parts of the complex conductivity of the crystal have been obtained as a result of analysis of an electron layer response on exciting ac voltage with frequency corresponding to the mode (0,1) of the coupled phonon-ripplon oscillations. An analysis of the results allows us to suppose that structural defects of the electron crystal play an essential role in dissipation processes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 120, Issues 1–3, June 2005, Pages 197-200
نویسندگان
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