Exciting odd-frequency equal-spin triplet correlations at metal-superconductor interfaces

Subhajit Pal; Colin Benjamin

doi:10.1103/PhysRevB.104.054519

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Exciting odd-frequency equal-spin triplet correlations at metal-superconductor interfaces

Subhajit Pal, Colin Benjamin

DOI 10.1103/PhysRevB.104.054519 · Physical Review B

T1

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Abstract

We predict the occurrence of odd-frequency equal-spin triplet correlations at normal metal-superconductor junction. This result is significant because equal-spin triplet correlations are associated with the presence of dissipation-less pure spin current. Inserting a spin-flipper at the interface of a normal metal-superconductor junction excites equal-spin triplet correlations. The existence of odd-frequency equal-spin triplet correlations in the absence of odd-frequency mixed-spin triplet correlations is the main conclusion of this work. It tallies well with the measured local magnetization density of states and spin-polarized local density of states at the interface. The importance of spin-flip scattering to the obtained results is manifest when we compare our normal metal-spin flipper-superconductor junction to other hybrid junctions where either only spin mixing or both spin mixing and spin-flip scattering are present.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown