Stripes Have Hair

Abstract

It is suggested that recent experiments provide evidence for modulations along the charged stripes in the striped phase of the cuprates. Furthermore, 1/8 doping is special because it is associated with a crossover: for lower doping the magnetic stripe width changes; for higher, the hole-doped stripes grow. The crossover is reflected in the doping dependence of the spin gap.

4 pages LaTex, 2 ps figures