Some global properties of the attractive Hubbard model in the superconducting phase: theT-matrix approximation in two dimensions
العنوان: | Some global properties of the attractive Hubbard model in the superconducting phase: theT-matrix approximation in two dimensions |
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المؤلفون: | J. J. Rodriguez, S. Schafroth, H. Beck |
المصدر: | Journal of Physics: Condensed Matter. 9:L111-L118 |
بيانات النشر: | IOP Publishing, 1997. |
سنة النشر: | 1997 |
مصطلحات موضوعية: | Superconductivity, Physics, Electron density, Hubbard model, Condensed matter physics, Fast Fourier transform, Phase (waves), Function (mathematics), Condensed Matter Physics, Convolution, Condensed Matter::Superconductivity, General Materials Science, Constant (mathematics), Mathematical physics |
الوصف: | We have applied the Fast Fourier transform (FFT), which allows to compute efficiently convolution sums, to solve the set of self-consistent T-matrix equations to get the Green function of the two dimensional attractive-U Hubbard modelbelow $T_c$, extending previous calculations of the same authors. Using a constant order parameter $\Delta(T)$, we calculated $T_c$ as a function of electron density and interaction strength $U$. These global results deviate from the BCS behavior remarkably. |
تدمد: | 1361-648X 0953-8984 |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::22835871f94cfed529679b4ba1e4be3b https://doi.org/10.1088/0953-8984/9/9/001 |
حقوق: | OPEN |
رقم الأكسشن: | edsair.doi...........22835871f94cfed529679b4ba1e4be3b |
قاعدة البيانات: | OpenAIRE |
تدمد: | 1361648X 09538984 |
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