Magnon like solutions for strings in I-brane background
  We study the solutions for fundamental string rotating in a background generated by a 1+1 dimensional intersection of two orthogonal stacks of fivebranes in type IIB string theory. We show the existence of magnon like solutions for the string moving simultaneously in the two spheres in this background and find the relevant dispersion relation among the various conserved charges. 
J. Kluson, Bum-Hoon Lee, Kamal L. Panigrahi and Chanyong Park