کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5426908 1395912 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High resolution scanning tunneling spectroscopy of ultrathin Pb on Si(1 1 1)-(6 Ã— 6) substrate
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
High resolution scanning tunneling spectroscopy of ultrathin Pb on Si(1 1 1)-(6 Ã— 6) substrate
چکیده انگلیسی

The electronic structure of Si(1 1 1)-(6 × 6)Au surface covered with submonolayer amount of Pb is investigated using scanning tunneling spectroscopy. Already in small islands of Pb with thickness of 1 ML Pb(1 1 1) and with the diameter of only about 2 nm we detected the quantized electronic state with energy 0.55 eV below the Fermi level. Similarly, the I(V) characteristics made for the Si(1 1 1)-(6 × 6)Au surface reveal a localized energy state 0.3 eV below the Fermi level. These energies result from fitting of the theoretical curves to the experimental data. The calculations are based on tight binding Hubbard model. The theoretical calculations clearly show prominent modification of the I(V) curve due to variation of electronic and topographic properties of the STM tip apex.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 600, Issue 8, 15 April 2006, Pages 1641-1645
نویسندگان
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