Fig. 5: Absence of static SDW/stripe and q = 0 order.
From: Gapped commensurate antiferromagnetic response in a strongly underdoped model cuprate superconductor
a Triple-axis momentum scan, across qAF along [0 1 0], at ω = 0 at 5 K (black squares) and 80 K (red circles). Blue crosses: locations where SDW/stripe order is observed at a similar doping level in LSCO (p = 0.06)11. Inset: schematic of the momentum-scan range (blue arrow) and characteristic wave vectors for LSCO (p = 0.06, blue crosses). See Supplementary Information for more details. b Spin-polarized neutron scattering results for the magnetic scattering intensity at the (1 0 0) reflection, determined from the inverse flipping ratio; see Fig. S8 in the Supplementary Information for the full inverse flipping ratio data. The highly underdoped (Hg1201-UD55, blue circles) and optimally doped (Hg1201-OP95, red triangles; data from ref. 37) samples show no detectable static magnetic order, in contrast to the moderately underdoped sample (Hg1201-UD71, yellow squares; data from ref. 37). All data were obtained with the D7 spectrometer at ILL. The gray band corresponds to the 1.7 mbarn upper bound for the magnetic intensity of Hg1201-UD55 (see main text).
