Temperature variation of the pseudogap in underdoped cuprates

被引：54
作者：
Chubukov, AV
Schmalian, J
机构：
[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[2] Univ Illinois, Dept Phys, Urbana, IL 61801 USA
来源：
PHYSICAL REVIEW B | 1998年 / 57卷 / 18期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevB.57.R11085
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We consider thermal evolution of the spectral function A(Omega,T) in underdoped cuprates at T>T-c. We find that in the strong-coupling Limit, the fermionic Green's function near (0,pi) behaves as G(-1)(Omega)proportional to root Omega in the whole frequency range relevant to photoemission experiments. The analysis of the pairing problem with this form. of G yields a leading edge gap in A(Omega) and a broad maximum at larger frequencies. We find that classical fluctuations predominantly add a frequency independent term to G(-1)(Omega). This term destroys the leading edge gap at T=T*(k) which has a maximum value of about 200 K near (0,pi).
引用
收藏
页码：R11085 / R11088
页数：4
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