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arXiv 0908.0412cond-mat.supr-concond-mat.str-el
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欠掺杂铜氧化物超导体扫描隧道显微镜图中棋盘格图案的成因

On the Origin of the Checkerboard Pattern in Scanning Tunneling Microscopy Maps of Underdoped Cuprate Superconductors

Kai-Yu Yang, Wei-Qiang Chen, T. M. Rice, Fu-Chun Zhang

摘要:

当STM位于最外层CuO $_{\text{2}}$ -平面的O-位上时,在欠掺杂铜氧化物的微分电导图中出现棋盘图案。在这个位置上的隧道路径之间的干扰,通过顶端离子以上的相邻的Cu-网站导致一个不对称的加权的最终状态中的两个波腹区域的${\boldsymbol{k}}$ -空间。在差分电导谱中的棋盘图案的不对称的形式有利于在本地化长度的不对称,而不是一个基本的起源的位移。

英文摘要:

The checkerboard pattern in the differential conductance maps on underdoped cuprates appears when the STM is placed above the O-sites in the outermost CuO$_{\text{2}}$-plane. In this position the interference between tunneling paths through the apical ions above the neighboring Cu-sites leads to an asymmetric weighting of final states in the two antinodal regions of ${\boldsymbol{k}}$-space. The form of the asymmetry in the differential conductance spectra in the checkerboard pattern favors asymmetry in the localization length rather than a nematic displacement as the underlying origin.

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。

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