کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1518953 | 1511629 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Narrow antiadiabatic peak in optimally doped and underdoped high-Tc superconductors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We study the effect of antiferromagnetic (AF) correlations in the three-band Emery model, with respect to the experimental situation in weakly underdoped and optimally doped BSCCO. In the vicinity of the vH singularity of the conduction band there appears a central peak in the middle of a pseudogap, due to an antiadiabatic quasiparticle, which is insensitive to the energy scale of the mechanism responsible for the pseudogap. We find a quantum low-temperature regime, in which the pseudogap profile is created by zero-point motion of the magnons. Detailed analysis of the spectral functions along the (Ï,0)-(Ï,Ï) line shows significant agreement with experiment. We conclude that optimally doped BSCCO has a well-developed pseudogap of the order of 1000Â K. This is only masked by the antiadiabatic quasiparticle, which provides the experimentally observed small binding energy scale.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 67, Issues 1â3, JanuaryâMarch 2006, Pages 316-320
Journal: Journal of Physics and Chemistry of Solids - Volume 67, Issues 1â3, JanuaryâMarch 2006, Pages 316-320
نویسندگان
D.K. Sunko, S. BariÅ¡iÄ,