Date:
Tue, 18/02/202012:00-13:30
Location:
Danciger B building, Seminar room
Lecturer: YakovKopelevich, TheState University of Campinas (UNICAMP, Brazil)
Abstract:
It has been recognized long ago, and more recently confirmed experimentally,thatpeculiarity of electrons in graphite monolayer (graphene) is related to theparticular linear spectrum of charge carriers expanding in a vicinity of thecorner point K of the hexagonal Brillouin zone (BZ), similar to the conicaldispersion of massless Dirac Fermions (DF) in 2D Quantum Electrodynamics.Because a real bulk graphite always contains nearly decoupled and misorientedgraphiticplanes, some of fundamental physical properties of N-layer (N = 1,2,3,…) graphenehave been experimentally uncovered in bulk graphite prior and after experimentsperformed on graphene.In this presentationwe give a comparative analysis ofcommon physical properties found in graphite and N-layer graphene, focusing onthe phenomena such as superconductivity, ferromagnetism, integer and fractionalquantum Hall effects, discovered in these systems during the last ~ 20 years.
Abstract:
It has been recognized long ago, and more recently confirmed experimentally,thatpeculiarity of electrons in graphite monolayer (graphene) is related to theparticular linear spectrum of charge carriers expanding in a vicinity of thecorner point K of the hexagonal Brillouin zone (BZ), similar to the conicaldispersion of massless Dirac Fermions (DF) in 2D Quantum Electrodynamics.Because a real bulk graphite always contains nearly decoupled and misorientedgraphiticplanes, some of fundamental physical properties of N-layer (N = 1,2,3,…) graphenehave been experimentally uncovered in bulk graphite prior and after experimentsperformed on graphene.In this presentationwe give a comparative analysis ofcommon physical properties found in graphite and N-layer graphene, focusing onthe phenomena such as superconductivity, ferromagnetism, integer and fractionalquantum Hall effects, discovered in these systems during the last ~ 20 years.