کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9868360 | 1530688 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The isotope coefficient of the pseudogap in high-Tc superconductors
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The isotope coefficient of the pseudogap in high-Tc superconductors The isotope coefficient of the pseudogap in high-Tc superconductors](/preview/png/9868360.png)
چکیده انگلیسی
In the Letter, we present the theory of the phonon-induced spin density waves (SDW) for two-dimensional electron system. In our considerations two-dimensional materials are modeled by the logarithmic singularity in the density of states. The SDW gap is identified as the pseudogap (PG) in the energy spectrum of underdoped superconductors. In the Letter, we construct the Eliashberg equations for spin density waves, derive analytically the expression for the SDW transition temperature TSDW and the adequately isotope coefficient αSDW. We show that the strong-coupling SDW theory can explain qualitatively the experimental features, such as the large values of the pseudogap critical temperature Tâ and the small value of the pseudogap isotope coefficient αâ, despite the fact that SDW originates from pure electron-phonon interaction. However, the strong Coulomb correlations play more important role in the cuprates and must be included in the complete quantitative analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 336, Issues 4â5, 14 March 2005, Pages 402-411
Journal: Physics Letters A - Volume 336, Issues 4â5, 14 March 2005, Pages 402-411
نویسندگان
R. Szcz驁niak,