  We theoretically predict that a large variety of Dirac-cone materials can be
constructed in Bi${}_{1-x}$Sb${}_{x}$ thin films, and we here show how to
construct single-, bi- and tri- Dirac-cone materials with various amounts of
wave vector anisotropy. These different types of Dirac cones can be of special
interest to electronic devices design, quantum electrodynamics and other
fields.
