Loop-current and density-wave orders in half-filled SU(N) two-leg ladders are dual under lattice and low-energy symmetries and are stabilized by Hund coupling for N>2.
Nayak ,\ http://link.aps.org/doi/10.1103/PhysRevB.62.4880 journal journal Phys
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Loop-current orderings in SU($N$) two-leg fermionic ladder through duality symmetries
Loop-current and density-wave orders in half-filled SU(N) two-leg ladders are dual under lattice and low-energy symmetries and are stabilized by Hund coupling for N>2.