Alexander Balatsky
Los Alamos National Laboratory and Nordita
The
past 25 years have witnessed a rapid expansion of research
into materials which host relativistic
particles.
Discoveries of superfluid phases in 3He, high
temperature superconductors, graphene and topological
insulators have
brought into focus materials in which the elementary
excitations, or quasiparticles are described by
the same Dirac equation
that governs relativistic particles. This class of
materials, called Dirac materials, exhibits unusual
universal
features: Klein tunneling, chirality and impurity
resonances.
Dirac materials hold a significant promise for applications as
they can be tuned in response to small changes in parameters.
I will also discuss the next step in the evolution of
the field: control of driven Dirac matter. The field is
now exploring the tunability
of nodal states as we apply external drives to
manipulate fermions and bosons in graphene, topological
insulators and
oxide
superconductors.
T. Wehling, A. M. Black-Schaffer and A. V. Balatsky, Dirac
materials, Advances
in Physics 63, 76, (2014).
C. Triola, A. Pertsova, R Markiewicz and A. V. Balatsky,
Excitonic Gap Formation in Pumped Dirac Materials,
Phys.
Rev. B 95, 205410 (2017) .
M. Geilhufe, S. Borysov and A.V. Balatsky, 3-dimensional
organic Dirac-line material due to
non-symmorphic
symmetry. arXiv:1610.07815
(use of the database to search for Dirac Materials)