HYDROGENIC IMPURITY STATES IN LATERAL-SURFACE-MODULATION QUANTUM WIRES

We calculate hydrogenic impurity binding energy in quasi-one-dimension al GaAs/AlAs quantum wires with periodical lateral surface structure b y making use of a variational approach. By a coordinate transformation , the structured interfaces of the wires are transformed into planar o nes so that the boundary conditions of the electronic wave functions c an be satisfied exactly on the interfaces. The dependence of the bindi ng energies on the positions of the impurities and on the lateral surf ace structures is studied.