کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1819916 | 1525771 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Variational Monte Carlo study of pairing symmetry in Sr2RuO4
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
With a mind to superconductivity (SC) arising in Sr2RuO4, we study a Hubbard model on square lattice including second-neighbor hopping tâ², using an optimization variational Monte Carlo method. As a pairing state, we have chosen dx2-y2(d) wave for singlet and px (p)-wave for triplet pairing state. In the trial wave functions, a doublon-holon binding effect is introduced in addition to the onsite Gutzwiller projection. By calculating condensation energies of the SC states, we found that when tâ²Â = â0.4t, the d-wave state is stabilized against the normal state for 0.6 < n < 1. On the other hand, p-wave state is never stabilized in this regime. Based on this result, it is difficult to understand a spin-triplet state simply from the single-band Hubbard model with onsite Coulomb interaction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity and its Applications - Volumes 463â465, 1 October 2007, Pages 134-137
Journal: Physica C: Superconductivity and its Applications - Volumes 463â465, 1 October 2007, Pages 134-137
نویسندگان
Shogo Fujita, Tsutomu Watanabe, Seiichiro Onari, Hisatoshi Yokoyama, Yukio Tanaka, Jun-ichiro Inoue,