Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator
Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator
Electrons with a linear energy/momentum dispersion are called massless Dirac electrons and represent the low-energy excitations in exotic materials like Graphene and Topological Insulators (TIs). Dirac electrons are characterized by notable properties like a high mobility, a tunable density and, in TIs, a protection against backscattering through the spin-momentum looking …