کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10728427 1038031 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamical properties of S=1 bond-alternating Heisenberg chains at finite temperatures
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
Dynamical properties of S=1 bond-alternating Heisenberg chains at finite temperatures
چکیده انگلیسی
Dynamical structure factors of the S=1 bond-alternating spin chains in the dimer phase are calculated at finite temperature, using the pair dynamical correlated-effective-field approximation. At T=0, the delta-function-type peak of the one-magnon mode appears. When temperature is increased, such a sharp peak is broadened and the additional weak peak caused by the excitation from the triplet state to the quintet state emerges in the higher energy region. The results are discussed in comparison with those obtained by the exact diagonalization method.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 343, Issue 6, 22 August 2005, Pages 462-468
نویسندگان
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