Composite Operator Method Analysis of the Underdoped Cuprates Puzzle

Figure 5

(Color online) Spectral function at the chemical potential as a function of momentum for , and (a) , (b) , (c) , and (d) (). The solid line marks the locus , the dashed line marks the locus , the gray lines are labeled with the values of , and the dotted line is a guide to the eye and marks the reduced (antiferromagnetic) Brillouin zone.

(a)

(b)

(c)

(d)