Influence of both electric and magnetic fields on the polaron properties in a finite-potential quantum well wire

Simultaneous effects of electric and magnetic fields on the basic parameters of confined and interface polarons in cylindrical quantum well wires with a finite confining potential are studied theoretically for the first time. The analytical expressions for the quasi-one-dimensional Fröhlich polaron self-energy and effective mass are obtained as functions of the wire radius and the strength of external fields. A comparative analysis of the confined and interface phonons contribution to polaron self-energy and effective mass is presented. We find that in a sufficiently closely arranged quantum wires system polaronic states may become a mechanism of electronic charge transfer perpendicular to the wire axis and can be controlled by external fields. The results can be used in the interpretation of optical phenomena related to polaron motion in cylindrical nanowire when the effect of applied fields competes with the spatial quantum confinement.