The purpose of this work is to present a learning workshop covering variousphysics concepts aimed at strengthening physics/engineering student understandingabout the remarkable properties of two dimensional materials, graphenein particular. At the basis of this learning experience is the idea ofblending and interconnecting separate pieces of knowledge already acquiredby undergraduates in different courses and to help them visualize and link theconcepts lying beyond separate chunks of information or equations. Graphenerepresents an appropriate unifying framework to achieve this task in view of itsmonatomic structure and various exotic processes peculiar to this and someother two dimensional crystals. We first discuss essential elements of grouptheory and their application to the symmetry properties of graphene with theaim of presenting to physics/electronic engineering undergraduates that in asystem characterized by symmetry properties such as a crystal, the acquisitionof the solutions of the Schrödinger equation is simpler and easier to visualizethan when these properties are ignored. We have then selected and discussedsome remarkable properties of graphene: the linear electron energy-momentumdispersion relation in proximity of some edge points of the Brillouin zone;the consequential massless Dirac behaviour of the electrons; their tunnellingbehaviour and the related Klein paradox; the chiral behaviour of electrons andholes; the fractional quantum Hall effect in massless particles; and thequantum behaviour of correlated quasiparticles observable at macroscopiclevel. These arguments are presented in a context covering related pieces ofknowledge about classical, quantum and relativistic mechanics. Finally, wemention current applications and possible future ones with the aim of providingstudents with an expertise that could be useful for further work experiences and scientific investigations regarding new materials, having farreachingimplications in various fields such as basic physics, materials scienceand engineering applications.
|Numero di pagine||25|
|Rivista||European Journal of Physics|
|Stato di pubblicazione||Published - 2018|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)