Temperature and doping dependence of the high-energy kink in cuprates

被引：43
作者：
Zemljic, M. M. [1 ]
Prelovsek, P. [1 ,2 ]
Tohyama, T. [3 ]
机构：
[1] Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia
[2] Univ Slovenia, Fac Math & Phys, SI-1000 Ljubljana, Slovenia
[3] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 03期
关键词：
D O I：
10.1103/PhysRevLett.100.036402
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
It is shown that spectral functions within the extended t-J model, evaluated using the finite-temperature diagonalization of small clusters, exhibit the high-energy kink in single-particle dispersion consistent with recent angle-resolved photoemission results on hole-doped cuprates. The kink and waterfall-like features persist up to large doping and to temperatures beyond J; hence, the origin can be generally attributed to strong correlations and incoherent hole propagation at large binding energies. In contrast, our analysis predicts that electron-doped cuprates do not exhibit these phenomena in photoemission.
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页数：4
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