Impurity resonance peaks in the vortex core of cuprate superconductors with induced spin density wave order

Wonkee Kim; Yan Chen; C. S. Ting

doi:10.1103/PhysRevB.80.172502

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Impurity resonance peaks in the vortex core of cuprate superconductors with induced spin density wave order

Wonkee Kim, Yan Chen, C. S. Ting

DOI 10.1103/PhysRevB.80.172502 · Physical Review B

T1

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Abstract

Considering the competing spin density wave (SDW) and d-wave superconductivity interactions, we investigate the effects of a nonmagnetic impurity on the vortex-core state of cuprate superconductors within the Bogoliubov–de Gennes formalism. We illustrate that the local SDW order is induced by the impurity on top of the magnetic field induced SDW order. The local density of states of a pinned vortex core exhibit a resonance peak at negative energy, which is drastically different from the double-peak structure observed in an unpinned vortex core. This resonance peak is insensitive to the impurity-scattering strength. Consequently, the impurity resonance peak may be used to identify the nature of vortex-core state of cuprate superconductors.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown