کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1867925 1038360 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
STM tunneling through a quantum wire with a side-attached impurity
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
STM tunneling through a quantum wire with a side-attached impurity
چکیده انگلیسی
The STM tunneling through a quantum wire (QW) with a side-attached impurity (atom, island) is investigated using a tight-binding model and the non-equilibrium Keldysh Green function method. The impurity can be coupled to one or more QW atoms. The presence of the impurity strongly modifies the local density of states of the wire atoms, thus influences the STM tunneling through all the wire atoms. The transport properties of the impurity itself are also investigated mainly as a function of the wire length and the way it is coupled to the wire. It is shown that the properties of the impurity itself and the way it is coupled to the wire strongly influence the STM tunneling, the density of states and differential conductance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 372, Issue 2, 7 January 2008, Pages 154-161
نویسندگان
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