Spin-Transfer and Exchange Torques in Ferromagnetic Superconductors

Jacob Linder; Arne Brataas; Zahra Shomali; Malek Zareyan

doi:10.1103/PhysRevLett.109.237206

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Spin-Transfer and Exchange Torques in Ferromagnetic Superconductors

Jacob Linder, Arne Brataas, Zahra Shomali, Malek Zareyan

DOI 10.1103/PhysRevLett.109.237206 · Physical Review Letters

T1

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Abstract

We consider how superconducting correlations influence spin-transfer torques in ferromagnetic superconductors. It is demonstrated that there is a novel torque arising from particle-hole interference that depends on the U(1) phase associated with the superconducting order parameter. We also show that there is an equilibrium exchange torque between two ferromagnetic superconductors in contact via a normal metal mediated by Andreev states. The latter equilibrium magnetic torque is also sensitive to spin-resolved phase differences in the superconducting order parameters as well as to an externally applied phase difference.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
UGe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
URhGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
UCoGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown