1303.2114 (Subir Sachdev et al.)

Charge ordering in metals with antiferromagnetic spin correlations    [PDF]

Subir Sachdev, Rolando La Placa

Metals with antiferromagnetic spin correlations have an instability to the superconductivity of spin-singlet Cooper pairs with d symmetry (for the Fermi surface of the cuprates). Metlitski et al. (arXiv:1005.1288) noted that in two dimensions, in the low energy continuum theory, this superconductivity is degenerate with a charge density wave ordering which has a local d symmetry under rotations about the lattice points. We present a momentum-space Hartree-Fock computation on a simple lattice model, and find that the d symmetry is dominant for a range of small ordering wavevectors including those observed in recent experiments. We propose a charge order parameter for the underdoped cuprates.

View original: http://arxiv.org/abs/1303.2114