Two nonmagnetic impurities in the d-wave-superconducting and d-density-wave states of the cuprate superconductors as a probe for the pseudogap

Brian Møller Andersen

doi:10.1103/PhysRevB.68.094518

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Two nonmagnetic impurities in the d-wave-superconducting and d-density-wave states of the cuprate superconductors as a probe for the pseudogap

Brian Møller Andersen

DOI 10.1103/PhysRevB.68.094518 · Physical Review B

T1

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Abstract

The quantum interference between two nonmagnetic impurities is studied numerically in both the d-wave superconducting (DSC) and the d-density wave (DDW) state. In all calculations we include the tunneling through excited states from the CuO2 planes to the BiO layer probed by the scanning tunneling microscope tip. Compared to the single-impurity case, a systematic study of the modulations of the two-impurity local density of states can distinguish between the DSC or DDW states. This is important if the origin of the pseudogap phase is caused by preformed pairs or DDW order. Furthermore, in the DSC state the study of the local density of states around two nonmagnetic impurities provides further tests for the potential scattering model versus more strongly correlated models.

Source-reported materials — not catalogue approval

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