  We study the dissociation of Feshbach molecules in ultracold Fermi gases with
spin-orbit (SO) coupling. Since SO coupling can induce quantum transition
between the Feshbach molecules and the fully polarized Fermi gas, the Feshbach
molecules can be dissociated by the SO coupling. We experimentally realized
this new type of dissociation in ultracold gases of 40K atoms with SO coupling
created by Raman beams, and observed that the dissociation rate is highly
non-monotonic on both the positive and negative Raman-detuning sides. Our
results show that the dissociation of Feshbach molecules can be controlled by
new degrees of freedoms, i.e., the SO-coupling intensity or the momenta of the
Raman beams, as well as the detuning of the Raman beams.
