Itinerant half-metal spin-density-wave state on the hexagonal lattice

Abstract

We consider electrons on a honeycomb or triangular lattice doped to the saddle point of the bandstructure. We assume system parameters are such that spin density wave (SDW) order emerges below a temperature $T_N$ and investigate the nature of the SDW phase. We argue that at $T<T_N$ the system develops a uniaxial SDW phase whose ordering pattern breaks $O(3)\times Z_4$ symmetry and corresponds to an eight site unit cell with non-uniform spin moments on different sites. This state is a half-metal -- it preserves full original Fermi surface, but has gapless charged excitations in one spin branch only. It allows for electrical control of spin currents and is desirable for nano-science.

References in corpus (6)

• The electronic properties of graphene
• Scalar spin chirality and quantum Hall effect on a triangular lattice
• Preemptive nematic order, pseudogap, and orbital order in the iron pnictides
• Functional renormalization group and variational Monte Carlo studies of the electronic instabilities in graphene near 1/4 doping
• Kohn-Luttinger superconductivity in graphene
• Pomeranchuk instability in doped graphene

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