کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9834463 1524910 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spin symmetry and spin current of helicity eigenstates of the Luttinger Hamiltonian
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Spin symmetry and spin current of helicity eigenstates of the Luttinger Hamiltonian
چکیده انگلیسی
A general spin symmetry argument is proposed for spin currents in semiconductors. In particular, due to the symmetry with respect to spin polarization of the helicity eigenstates of the Luttinger Hamiltonian for a hole-doped semiconductor, the spin polarized flux from a single helicity eigenstate induced by an external electric field, is canceled exactly when all such contributions from eigenstates that are degenerate in energy are summed. Thus, the net spin current predicted by Murakami et al. (Science 301 (2003) 1348), cannot be produced by such a Hamiltonian. Possible symmetry breaking mechanisms which may generate a spin current are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 288, March 2005, Pages 297-300
نویسندگان
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