کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1803230 1024613 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transport through a quantum dot subject to spin and charge bias
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Transport through a quantum dot subject to spin and charge bias
چکیده انگلیسی

Spin and charge transport through a quantum dot coupled to external nonmagnetic leads is analyzed theoretically in terms of the non-equilibrium Green function formalism based on the equation of motion method. The dot is assumed to be subject to spin and charge bias, and the considerations are focused on the Kondo effect in spin and charge transport. It is shown that the differential spin conductance as a function of spin bias reveals a typical zero-bias Kondo anomaly which becomes split when either magnetic field or charge bias are applied. Significantly different behavior is found for mixed charge/spin conductance. The influence of electron–phonon coupling in the dot on tunneling current as well as on both spin and charge conductance is also analyzed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 321, Issue 16, August 2009, Pages 2414–2420
نویسندگان
, , ,