کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5423841 | 1395803 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The evolution of sheet-plasmon behavior in silver monolayers on Si(1Â 1Â 1)-(3Ã3)-Ag surface
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The dispersion of sheet plasmons in two-dimensional electron gas (2DEG) systems prepared on Si(1Â 1Â 1)-(3Ã3)-Ag surface was investigated by angle-resolved high-resolution electron-energy-loss spectroscopy (HREELS) in an in-situ ultrahigh vacuum environment. The evolution of dispersion at the low coverage of additional silver adatoms shows a behavior associating with two-dimensional adatom gas phase and the critical coverage to sustain this phase is also determined. Dispersion at higher coverage of additional silver adatoms features a gap opening in the long wavelength limit (momentum qâ0), suggesting a new mode of plasmon. A calculation based on the theory of surface plasmons implies this plasmon is 3D-type surface plasmon and reveals a smooth transition from a 2D sheet plasmon to a 3D surface plasmon.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 603, Issue 13, 1 July 2009, Pages 2115-2119
Journal: Surface Science - Volume 603, Issue 13, 1 July 2009, Pages 2115-2119
نویسندگان
Yu Liu, Roy F. Willis,