Spin superconductor in ferromagnetic graphene

Abstract

We show a spin superconductor (SSC) in ferromagnetic graphene as the counterpart to the charge superconductor, in which a spin-polarized electron-hole pair plays the role of the spin $2(\hslash /2)$ `Cooper pair' with a neutral charge. We present a BCS-type theory for the SSC. With the `London-type equations' of the super-spin-current density, we show the existence of an electric `Meissner effect' against a spatial varying electric field. We further study a SSC/normal conductor/SSC junction and predict a spin-current Josephson effect.

6 pages, 4 figures

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• Experimental Signatures of Spin Superfluid Ground State in Canted Antiferromagnet Cr2O3 via Nonlocal Spin Transport
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• Spin-Triplet Excitonic Insulator: The Case of Graphone
• Anomalous Hall effect in 2D Dirac materials
• The spin-polarized $\nu =0$ state of graphene: a spin superconductor
• Superfluidity of pure spin current in ultracold Bose gases
• Theory for electric dipole superconductivity with an application for bilayer excitons
• Non-Abelian braiding in spin superconductors utilizing the Aharonov-Casher effect
• Spin phase regulated spin Josephson supercurrent in topological superconductor
• Spin-flip reflection at the normal metal-spin superconductor interface
• Spin Transport in Normal Metal-Ising Superconductor Junction
• Ginzburg-Landau-type theory of non-polarized spin superconductivity
• Dissipationless Spin-Charge Conversion in Excitonic Pseudospin Superfluid
• Topological spin-up triplet excitonic condensation in two-dimensional electron-hole systems
• Electromagnetic response in dipole superfluids: vortex lattices and singular domain walls
• Geometric phase driven Josephson junction: Possible experimental scheme for the search of spin superfluidity
• Anomalous spin Josephson effect in spin superconductors
• Spin transport in a normal meta-altermagnetic superconducting nanowire junction
• Fractional spin Josephson effect in topological spin superconductors
• Spin-polarized triplet excitonic insulators in Ta3X8 (X=I, Br) monolayers