Theory of tunneling spectroscopy of normal metal/ferromagnet/spin-triplet superconductor junctions

L. A. B. Olde Olthof; S.-I. Suzuki; A. A. Golubov; M. Kunieda; S. Yonezawa; Y. Maeno; Y. Tanaka

doi:10.1103/PhysRevB.98.014508

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Theory of tunneling spectroscopy of normal metal/ferromagnet/spin-triplet superconductor junctions

L. A. B. Olde Olthof, S.-I. Suzuki, A. A. Golubov, M. Kunieda, S. Yonezawa, Y. Maeno, Y. Tanaka

DOI 10.1103/PhysRevB.98.014508 · Physical Review B

T1

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Abstract

We study the tunneling conductance of a ballistic normal metal/ferromagnet/spin-triplet superconductor junction using the extended Blonder-Tinkham-Klapwijk formalism as a model for a c-axis-oriented Au/SrRuO3/Sr2RuO4 junction. We compare chiral p-wave (CPW) and helical p-wave (HPW) pair potentials, combined with ferromagnet magnetization directions parallel and perpendicular to the interface. For fixed θM, where θM is a direction of magnetization in the ferromagnet measured from the c axis, the tunneling conductances of CPW and HPW clearly show different voltage dependencies. It is found that the cases where the d vector is perpendicular to the magnetization direction (CPW with θM=π/2 and HPW with θM=0) are identical. The obtained results serve as a guide to determine the pairing symmetry of the spin-triplet superconductor Sr2RuO4.

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.	1.5	Pressure not reported	unknown