کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9867898 | 1530674 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Transport in a spin-polarized Luttinger liquid in the presence of a single impurity
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Transport in a spin-polarized Luttinger liquid in the presence of a single impurity Transport in a spin-polarized Luttinger liquid in the presence of a single impurity](/preview/png/9867898.png)
چکیده انگلیسی
The conductance for a single impurity in a one-dimensional gas with electron-electron interaction and Zeeman splitting vFââvFâ=Îâ 0 is considered. The presence of the Zeeman splitting gives rise to a non-diagonal bosonic model for the densities and canonical momenta conjugated to the densities. As a result the bosonic Hamiltonian cannot be diagonalized by a simple unitary transformation. To deal with the problem, we transform our model into the Lagrangian formalism. We find that for an extended Hubbard model controlled by the nearest neighbor interaction with a strength V gives rise to a term ÏâRÏâL+ÏâRÏâL. As a result, two Luttinger liquids for spin-up and spin-down electrons are obtained. We find the conductances for spin-up Gâ and spin-down Gâ are not equal. The anisotropy in the conductances Gââ Gâ gives rise to a spin-polarized wire.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 345, Issues 1â3, 26 September 2005, Pages 45-54
Journal: Physics Letters A - Volume 345, Issues 1â3, 26 September 2005, Pages 45-54
نویسندگان
Hsuan-Yeh Chang, D. Schmeltzer,