Some global properties of the attractive Hubbard model in the superconducting phase: theT-matrix approximation in two dimensions

التفاصيل البيبلوغرافية
العنوان: Some global properties of the attractive Hubbard model in the superconducting phase: theT-matrix approximation in two dimensions
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