Charge density of fractional charged quasiparticles in the composite fermion picture

摘要

Two different models for quasiparticles of the (nu) = 1/3 Laughlin incompressible state are investigated in the Fermion-Chern-Simons picture. In the first model a quasielectron (quasihole) is induced by adiabatically introducing an infinitesimally thin flux tube parallel (antiparallel) to the external magnetic field. The charge density induced is calculated in linear response theory. The quasielectron (quasihole) of the second model is obtained by creating (annihilating) a composite fermion consisting of a real electron with two attached magnetic flux quanta. Both models give a same total charge (+-) 1/3e for quasiparticles; but they produce different charge density distributions (rho)(r). The self-energies (Coulomb) of quasiparticles are discussed.