Spin supercurrent in the canted antiferromagnetic phase

2012/11/30 by Yusuke Hama, G. Tsitsishvili, George Tsitsishvili +2 · 1 citation
Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.87.104516

published as Phys. Rev. B 87, 104516 (2013) · 5 pages, 1 figure

openalex publication_date 2013/03/22 · arxiv created 2013/04/01 · arxiv updated 2013/04/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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 \ensuremathν=2. A complex Goldstone mode emerges describing such a combined degree of freedom. In the zero tunneling-interaction limit (\ensuremathΔ_SAS\ensuremath→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 \ensuremathν=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.

Citations

• Counterflow Measurements in Strongly Correlated GaAs Hole Bilayers: Evidence for Electron-Hole Pairing
• Observation of Quantized Hall Drag in a Strongly Correlated Bilayer Electron System
• Spin Bose-Glass Phase in Bilayer Quantum Hall Systems atν<mml:mspace/>=<mml:mspace/>2
• Dominant parameters for the critical tunneling current in bilayer exciton condensates
• Critical tunneling currents in the regime of bilayer excitons
• Bose–Einstein condensation of excitons in bilayer electron systems
• Canted antiferromagnetic and spin-singlet quantum Hall states in double-layer systems
• SU(4)skyrmions and activation energy anomaly in bilayer quantum Hall systems
• The study of Goldstone modes in ν = 2 bilayer quantum Hall systems

Cited by

• Nambu-Goldstone modes and the Josephson supercurrent in the bilayer quantum Hall system