Graphene Functionalized with Hydrogen and Fluorine: Electronic Correlations, Magnetism, and Transport
by
Prof.Jorge O. Sofo(Physics and of Materials Science and Engineering - The Pennsylvania State University)
→
Europe/Rome
Aula Conversi (Dipartimento di Fisica - Ed. G. Marconi)
Aula Conversi
Dipartimento di Fisica - Ed. G. Marconi
Description
For an Electronic Engineer, a material with very high electron
mobility that is not significantly degraded by temperature or doping is a
dream material. For a Physicist, a material where the magnetism can by
controlled by electric fields and the Quantum Hall Effect can be observed at
room temperature is a dream material. These two sentences would be enough to
capture the attention of an audience, but graphene has even more interesting
properties. The material is two dimensional, the electrons follow the
dynamics of massless relativistic Dirac Fermions, the carrier density can be
changed by orders of magnitude with the application of a gate voltage, and
it can be reversibly transformed in an insulator by hydrogenation or
fluorination. Covering all this in one seminar would be impossible.
Therefore, I will offer a personal selection of topics that emphasize the
interplay between experiment, theory, and simulations in order to gain
understanding and control on the properties of graphene. Chemical
functionalization has resulted in a box of surprises. It opens the way to
magnetism, localization, and other interesting phenomena that are unexpected
in materials made of carbon. We will review the fascinating magnetic states
produced with hydrogenation and fluorination of graphene as well as their
influence on its transport properties.