  A new type of linear response Hall effect is predicted in
time-reversal-invariant systems with built-in electric field at zero magnetic
field. The Hall response results from a quantum Magnus effect where a
self-rotating Bloch electron wavepacket moving under electric field develops an
anomalous velocity in the transverse direction. We show that in the ballistic
limit the Magnus Hall conductance measures the distribution of Berry curvature
on the Fermi surface.
