Energy-dependent modulations in the local density of states of the cuprate superconductors
Energy-dependent modulations in the local density of states of the cuprate superconductors
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DOI：
10.1103/physrevb.67.100506
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发表时间：
2003-03
影响因子：
3.7
通讯作者：
Degang Zhang;C. Ting
中科院分区：
文献类型：
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作者：
Degang Zhang;C. Ting
受最近的扫描隧道显微镜（STM）实验的启发[J.E.霍夫曼等人，Science 297，1148（2002）]，我们研究了d波超导体中弱缺陷和扩展缺陷引起的局域态密度的能量依赖调制。的傅立叶分量的局域态密度计算的缺陷参数的第一阶。我们的数值计算得到的图像地图与能量相关的电荷调制波矢量在不同的掺杂表现出的基本特征，通过实验测量。我们还预测了新的调制波矢量在第一布里渊区。希望它们能够通过未来的STM实验得到验证。
Motivated by the recent scanning tunneling microscopy (STM) experiment [J. E. Hoffman et al., Science 297, 1148 (2002)], we investigate the energy-dependent modulation of local density of states induced by a weak and extended defect in a d-wave superconductor. The Fourier component of the local density of states is calculated up to the first order in the defect parameters. Our numerically obtained image maps together with the energy-dependent charge modulation wave vectors at different dopings exhibit the essential features as those measured by the experiment. We also predict new modulation wave vectors in the first Brillouin zone. Hopefully, they could be verified by future STM experiments.