Specific features of the thermal electromotive force in Bi quantum wires in transverse magnetic and electric fields

The thermal electromotive force (emf) in Bi quantum wires has been calculated in the model of potential in the form of a paraboloid of revolution in a uniform magnetic field $\mathbf{H}$, which is normal to the axis of the studied nanostructure, and in a direct-current (dc) electric field $\mathbf{E}\parallel\mathbf{H}$. It has been shown that, with an increase in $\mathbf{E}$, the thermal emf $\alpha_{xx}$ is described by a nonmonotonic function at different values of $\mathbf{H}$. A physical interpretation of this behavior of $\alpha_{xx}$ as a function of $\mathbf{E}$ is proposed with account for the interaction between carriers and the rough surface of the nanowire.