arXivDaily arXiv每日学术速递 周一至周五更新
arXiv cond-mat/0209651cond-mat.str-el
收藏

半填充CuO_2平面电子结构的普适性

Universality of the Electronic Structure from a Half Filled CuO_2 Plane

F. Ronning, C. Kim, K. M. Shen, N. P. Armitage, A. Damascelli, D. H. Lu, D. L. Feng, Z. -X. Shen, L. L. Miller, Y. -J. Kim, F. Chou, I. Terasaki

摘要:

本文给出了A_2CuO_2X_2(A=Sr,Ca; X=Cl,Br),Sr_2Cu_3O_4Cl_2和Bi_2Sr_2MCu_2O_8(M=Er,Dy)单晶的角分辨光电子能谱(ARPES)数据。通过对Ca_2CuO_2Cl_2的光子能量依赖性的研究,我们能够区分出固有的特征和光电发射矩阵元的结果。我们发现,色散是独立的光子能量,而在反铁磁区边界的电子占据概率的不对称性是强大的光子能量的变化。最后,我们表明,d-波的分散存在于沿反铁磁区边界的绝缘体并不精确地符合简单的d-波的功能形式附近的节点方向。

英文摘要:

We present angle resolved photoemission (ARPES) data from insulating A_2CuO_2X_2 (A=Sr, Ca; X=Cl, Br), Sr_2Cu_3O_4Cl_2, and Bi_2Sr_2MCu_2O_8 (M=Er, Dy) single crystals which illustrate that the low energy electronic structure of the half-filled cuprates are independent of the apical atom. By performing a photon energy dependent study on Ca_2CuO_2Cl_2 we are able to distinguish between features which are intrinsic and those which are a result of the photoemission matrix elements. We find that the dispersion is independent of photon energy, while an asymmetry in the electron occupation probability across the antiferromagnetic zone boundary is robust to variations in photon energy. Finally, we show that the d-wave-like dispersion which exists in the insulator along the antiferromagnetic zone boundary does not precisely fit the simple d-wave functional form near the nodal direction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑