Fermi momentum resolved charge order for spin-disordered stripes

Abstract

For a doped antiferromagnet with short-range spin-stripe correlations and long-range charge-stripe order, we find that the manifestation of charge order abruptly changes as a function of momentum along the Fermi surface. The disorder averaged local density of states is almost perfectly homogeneous when integrated only over states that contribute to the ``nodal'' spectral weight, whereas it displays long-range charge-stripe order when integrated only over states that contribute to the ``antinodal'' spectral weight. An effectively two dimensional isotropic nodal liquid can thus coexist with static charge stripes provided there is no static spin order. We also study commensurate spin- and charge-stripe ordered systems wherein the Fermi surface consists of a nodal hole pocket and an open ``stripe band'' section. Due to the stripe order, the relation between hole density and size of a pocket will be reduced compared to that of a paramagnet by factors of 2 for even charge period and 4 for odd charge period, and we find an estimated upper limit on the area fraction of a hole pocket of 1.6% for charge-period four and 4% for charge-period five. We also discuss why electron pockets are not expected for a stripe ordered system and show that the open Fermi surface section may be electronlike with a negative Hall coefficient.