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

页码：R11085 / R11088

页数：4

共 20 条

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