  We demonstrate two-dimensional robust Raman cooling in a four-level tripod
system, in which velocity-selective population transfer is achieved by a STIRAP
pulse. In contrast to basic 2D Raman cooling with square envelope pulses [Phys.
Rev. A 83, 023407 (2011)], the technique presented here allows for a wide
variation in the pulse duration and amplitude once the adiabaticity criterion
is satisfied. An efficient population transfer together with attaining of a
narrow spread of the resonant-velocity group leads to the narrowing of the
velocity-distribution spread down to $0.1v_\mathrm{rec}$, corresponding to an
effective temperature equal to $0.01 T_\mathrm{rec}$. This robust method opens
new possibilities for cooling of neutral atoms.
