B1g声子与Bi2Sr2Ca0.92Y0.08Cu2O8+δ的反节点电子态的耦合。

Coupling of the B1g phonon to the antinodal electronic states of Bi2Sr2Ca0.92Y0.08Cu2O8+delta.

作者信息

Cuk T, Baumberger F, Lu D H, Ingle N, Zhou X J, Eisaki H, Kaneko N, Hussain Z, Devereaux T P, Nagaosa N, Shen Z-X

机构信息

Departments of Physics, Applied Physics, and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305, USA.

出版信息

Phys Rev Lett. 2004 Sep 10;93(11):117003. doi: 10.1103/PhysRevLett.93.117003.

DOI:10.1103/PhysRevLett.93.117003

PMID:15447370

Abstract

Angle-resolved photoemission spectroscopy on optimally doped Bi(2)Sr(2)Ca(0.92)Y(0.08)Cu(2)O(8+delta) uncovers a coupling of the electronic bands to a 40 meV mode in an extended k-space region away from the nodal direction, leading to a new interpretation of the strong renormalization of the electronic structure seen in Bi2212. Phenomenological agreements with neutron and Raman experiments suggest that this mode is the B(1g) oxygen bond-buckling phonon. A theoretical calculation based on this assignment reproduces the electronic renormalization seen in the data.

摘要

对最佳掺杂的Bi(2)Sr(2)Ca(0.92)Y(0.08)Cu(2)O(8+δ)进行角分辨光电子能谱研究，发现在远离节点方向的扩展k空间区域中，电子能带与一个40毫电子伏特的模式存在耦合，这为Bi2212中电子结构的强重整化提供了新的解释。与中子和拉曼实验的唯象一致性表明，这个模式是B(1g)氧键弯曲声子。基于这一归属的理论计算再现了数据中观察到的电子重整化现象。