کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1855233 1529927 2009 31 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Non-equilibrium scaling analysis of the Kondo model with voltage bias
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
Non-equilibrium scaling analysis of the Kondo model with voltage bias
چکیده انگلیسی
The quintessential description of Kondo physics in equilibrium is obtained within a scaling picture that shows the buildup of Kondo screening at low temperature. For the non-equilibrium Kondo model with a voltage bias, the key new feature are decoherence effects due to the current across the impurity. In the present paper, we show how one can develop a consistent framework for studying the non-equilibrium Kondo model within a scaling picture of infinitesimal unitary transformations (flow equations). Decoherence effects appear naturally in third order of the β-function and dominate the Hamiltonian flow for sufficiently large voltage bias. We work out the spin dynamics in non-equilibrium and compare it with finite temperature equilibrium results. In particular, we report on the behavior of the static spin susceptibility including leading logarithmic corrections and compare it with the celebrated equilibrium result as a function of temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Annals of Physics - Volume 324, Issue 5, May 2009, Pages 1105-1135
نویسندگان
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