Simultaneous effects of hydrostatic pressure and electric field on impurity binding energy and polarizability in coupled InAs/GaAs quantum wires

► Binding energy for donor impurity in coupled wires strongly depends on the confinement potential. ► Polarizability for donor impurity in coupled wires strongly depends on the confinement potential. ► Binding energy strongly depends on the direction of the applied electric field. ► Polarizability strongly depends on the direction of the applied electric field. ► The coupling between the two parallel wires increases with the hydrostatic pressure.