Superconductivity, Pair Density Wave, and Néel Order in Cuprates*
Superconductivity, Pair Density Wave, and Néel Order in Cuprates*
We investigate in underdoped cuprates possible coexistence of the superconducting (SC) order at zero momentum and pair density wave (PDW) at momentum ${\bf Q}=(π, π)$ in the presence of a Neel order. By symmetry, the $d$-wave uniform singlet pairing $dS_0$ can coexist with the $d$-wave triplet PDW $dT_{\bf Q}$, and …