  An orbital current can be generated whenever an object has a translational
and rotational degree of freedom. In condensed matter physics, intra-atomic
contributions to the transverse orbital transport, labeled orbital Hall effect,
rely on propagating wave packets that must consist of hybridized atomic
orbitals. However, inter-atomic contributions have to be considered as well
because they give rise to a new mechanism for generating orbital currents. As
we show, even wave packets consisting purely of s electrons can transport
orbital angular momentum if they move on a cycloid trajectory. We introduce the
kagome lattice with a single s orbital per atom as the minimal model for the
orbital Hall effect and observe the cycloid motion of the electrons in the
surface states.
