Mechanism of superconductivity in a two-dimensional double-exchange system with spin-orbit coupling

Takao Morinari

doi:10.1103/PhysRevB.64.012510

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Mechanism of superconductivity in a two-dimensional double-exchange system with spin-orbit coupling

Takao Morinari

DOI 10.1103/PhysRevB.64.012510 · Physical Review B

T1

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Abstract

We propose a mechanism of unconventional superconductivity in a two-dimensional double-exchange system with spin-orbit coupling. We show that a Chern-Simons term is induced by integrating out the conduction-electron fields. In the presence of the Chern-Simons term, the conduction electrons behave like skyrmion or antiskyrmion excitations for the core spin system, which leads to a disordered state of the core spins. After magnetic long-range order is destroyed, the Chern-Simons term becomes dominant for the low-energy physics and leads to a p-wave pairing state of conduction electrons.

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
La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown