Impurity resonance states in electron-doped high-Tc superconductors
Yuan Wan, Hai-Dong Lü, Hong-Yan Lu, Qiang-Hua Wang
DOI 10.1103/PhysRevB.77.064515 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Two scenarios, i.e., the anisotropic s-wave pairing (the s-wave scenario) and the d-wave pairing coexisting with antiferromagnetism (the coexisting scenario), have been introduced to understand some of seemingly s-wave-like behaviors in electron-doped cuprates. We consider the electronic structure in the presence of a nonmagnetic impurity in the coexistence scenario. We find that even if the antiferromagnetic order opens a full gap in quasiparticle excitation spectra, the midgap resonant peaks in local density of states around an impurity can still be observed in the presence of a d-wave pairing gap. The features of the impurity states in the coexisting phase are markedly different from the pure antiferromagnetic or pure d-wave pairing phases, showing the unique role of the coexisting antiferromagnetic and d-wave pairing orders. On the other hand, it is known that in the pure s-wave case, no midgap states can be induced by a nonmagnetic impurity. Therefore, we propose that the response to a nonmagnetic impurity can be used to differentiate the two scenarios.
Similar papers
Impurity resonance states in electron-doped high T_c superconductors
similarity 0.94Yuan Wan et al. · 2007 · arXiv:0709.4527
Source status unknown — claims are unverified
Electron correlation and impurity-induced quasiparticle resonance states in cuprate superconductors
similarity 0.92Bin Liu et al. · 2013 · arXiv:1311.7253
Source status unknown — claims are unverified
s-Wave-Like excitation in the superconducting state of electron-doped cuprates with d-wave pairing
similarity 0.92Qingshan Yuan et al. · 2006 · arXiv:cond-mat/0610523
Source status unknown — claims are unverified
Impurity resonance peaks in the vortex core of cuprate superconductors with induced spin density wave order
similarity 0.91Wonkee Kim et al.
Source status unknown — claims are unverified
Resonant states and order-parameter suppression near pointlike impurities in d-wave superconductors
similarity 0.90Alexander Shnirman et al.
Source status unknown — claims are unverified
Spin-resolved impurity resonance states in electron-doped cuprate superconductors
similarity 0.90Bin Liu · 2008 · arXiv:0806.3502
Source status unknown — claims are unverified