Spin Supercurrent in the Canted Antiferromagnetic Phase

Abstract

The spin and layer (pseudospin) degrees of freedom are entangled coherently in the canted antiferromagnetic phase of the bilayer quantum Hall system at the filling factor $\nu =2$. There emerges a complex Goldstone mode describing such a combined degree of freedom. In the zero tunneling-interaction limit (${\Delta }_{\text{SAS}}\to 0$), its phase field provokes a supercurrent carrying both spin and charge within each layer. The Hall resistance is predicted to become anomalous precisely as in the $\nu =1$ bilayer system in the counterflow and drag experiments. Furthermore, it is shown that the total current flowing in the bilayer system is a supercurrent carrying solely spins in the counterflow geometry. It is intriguing that all these phenomena occur only in imbalanced bilayer systems.

5 pages, 1 figure

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Cited by in corpus (5)

• Entanglement Thermodynamics
• Spin-flip reflection at the normal metal-spin superconductor interface
• Interlayer coherence and entanglement in bilayer quantum Hall states at filling factor $\nu =2/\lambda$
• Dicke Model for Quantum Hall Systems
• Nambu-Goldstone modes and the Josephson supercurrent in the bilayer quantum Hall system