WebOne of the main interesting properties of graphene is the appearance of Dirac points in its energy band structure, i.e. the presence of points where the valence and conduction bands meet at conical intersections at which the dispersion is (locally) the same as for massless fermions moving at the speed of light. Image source Web7 de sept. de 2016 · Abstract. Although massless Dirac fermions in graphene constitute a centrosymmetric medium for in-plane excitations, their second-order nonlinear optical response is nonzero if the effects of ...
Band structure of graphene, massless Dirac fermions as …
WebWe have investigated how these bound states affect scaling properties of the induced density of filled Landau levels of massless Dirac fermions. For chiral fermions, we find, in strong coupling regime, that the density inside the repulsive potential can be greater than the value in the absence of the potential, while in the weak coupling regime, we find negative … Web24 de feb. de 2008 · As well as addressing fundamental questions about how the chiral massless Dirac fermions of graphene propagate in a periodic potential, our results … bardahl 5 en 1 utilisation
Graphene achieves record-breaking high magnetoresistance
Web1 Gate tunable third-order nonlinear optical response of massless Dirac fermions in graphene Tao Jiang, 1† Di Huang, 1† Jinluo Cheng,2 Xiaodong Fan,3,4 Zhihong Zhang,5 Yuwei Shan,1 Yangfan Yi,1 Yunyun Dai,1 Lei Shi,1,6 Kaihui Liu,5 Changgan Zeng,3,4 Jian Zi,1,6 J.E. Sipe,7 Yuen-Ron Shen,1,8 Wei-Tao Liu,1,6* Shiwei Wu1,6* 1 State Key … Web30 de oct. de 2015 · Using the Lewis–Riesenfeld method of invariants we construct explicit analytical solutions for the massless Dirac equation in 2+1 dimensions describing quasi-particles in graphene. The Hamiltonian of the system considered contains some explicit time-dependence in addition to one resulting from being minimally coupled to a time … Web1 de jul. de 2007 · The quantum Hall (QH) effect in two-dimensional electron and hole gas is studied in high quality graphene samples. Graphene samples whose lateral size ∼10 μm were fabricated into mesoscopic devices for electrical transport measurement in magnetic fields. In an intermediate field range of up to 10 T, a distinctive half-integer QH effect is ... sushi jericho