Quasiparticle states around a nonmagnetic impurity in a d-density-wave state of high-T(c) cuprates.
Quasiparticle states around a nonmagnetic impurity in a d-density-wave state of high-T(c) cuprates.
复制标题
高 T(c) 铜酸盐的 d 密度波态中非磁性杂质周围的准粒子态。
DOI：
10.1103/physrevlett.87.197001
复制
发表时间：
2001
影响因子：
8.6
通讯作者：
J. P. Carbotte
中科院分区：
文献类型：
--
作者：
J. X. Zhu;W. Kim;C. Ting;J. P. Carbotte
研究了d-密度波（DDW）有序中单个杂质周围的电子结构。发现杂质周围的局域态密度中出现了一个单一的亚带隙共振峰。在幺正极限下，共振峰的位置与化学势雅阁地偏离费米能级。这一结果与纯超导态的情况截然不同，在纯超导态中，杂质的共振能近似地固定在费米能级上。这可以用来探讨铜酸盐中DDW有序的存在。
The electronic structure around a single nonmagnetic impurity in the d-density-wave (DDW) ordering is studied. It is found that a single subgap resonance peak appears in the local density of states around the impurity. In the unitary limit, the position of this resonance peak shifts away from the Fermi energy in accord with the chemical potential. This result is dramatically different from the case of the pure superconducting state for which the impurity resonant energy is approximately pinned at the Fermi level. This can be used to probe the existence of the DDW ordering in cuprates.