Anomalous Magnetic Susceptibility and Hall Effect from Valley Degrees of   Freedom
  We study the magnetic and transport properties of epitaxial graphene films in this letter. We predict enhanced signal of magnetic susceptibility and relate it to the intrinsic valley magnetic moments. There is also an anomalous contribution to the ordinary Hall effect, which is due to the valley dependent Berry phase or valley-orbit coupling. 
Tianyi Cai, Wang Yao, Shengyuan A. Yang, Junren Shi and Qian Niu
cond-mat.mes-hall