Recently a new single-layer material—graphene—has been
discovered.
This is a material where Dirac points in the fermionic
spectrum lead
to very unusual properties, including transport and impurity
states.
I will argue that these properties are not unique to
graphene and in
fact are a direct consequence of the Dirac spectrum in the
fermionic
excitation sector.  Strong similarities with d-wave
superconductors,
superfluid 3He, p-wave superconductors and topological
insulators with
similar energy spectra offfer a unifying perspective.  Among the
similarities are response to defects, suppressed
backscattering and
unusual transport properties. I will discuss some observable
effects,
such as Kondo effect and impurity resonances, that
differentiate Dirac
Materials from other classes.