Andreev States near Short-Ranged Pairing Potential Impurities
Brian M. Andersen, Ashot Melikyan, Tamara S. Nunner, P. J. Hirschfeld
DOI 10.1103/PhysRevLett.96.097004 · Physical Review Letters
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
We study Andreev states near atomic scale modulations in the pairing potential in both s- and d-wave superconductors with short coherence lengths. For a moderate reduction of the local gap, the states exist only close to the gap edge. If one allows for local sign changes of the order parameter, however, resonances can occur at energies close to the Fermi level. The local density of states (LDOS) around such pairing potential defects strongly resembles the patterns observed by tunneling measurements around Zn impurities in Bi2Sr2CaCu2O8+x (BSCCO). We discuss how this phase impurity model of the Zn LDOS pattern can be distinguished from other proposals experimentally.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Influence of atomic-scale inhomogeneity of the pair interaction on the local pair formation and density of states of high-Tc superconductors
similarity 0.94A. M. Bobkov & I. V. Bobkova
Source status unknown — claims are unverified
Absence of Andreev reflections and Andreev bound states above the critical temperature
similarity 0.94Y. Dagan et al.
Source status unknown — claims are unverified
Spin and Charge Order around Vortices and Impurities in High-Tc Superconductors
similarity 0.94Jian-Xin Zhu et al.
Source status unknown — claims are unverified
Enhanced Pairing Correlations near Oxygen Dopants in Cuprate Superconductors
similarity 0.93Giniyat Khaliullin et al.
Source status unknown — claims are unverified
Effect of magnetic field on impurity bound states in high-Tc superconductors
similarity 0.93K. V. Samokhin & M. B. Walker
Source status unknown — claims are unverified
Revisiting quasiparticle scattering interference in high-temperature superconductors: The problem of narrow peaks
similarity 0.93Miguel Antonio Sulangi et al.
Source status unknown — claims are unverified