Quantized magneto-thermoelectric transport in low-dimensional junctions

Department of Physics and Astronomy, Northwestern University - Evanston, IL 60208, USA

Received: 17 November 2014
Accepted: 11 March 2015

Abstract

Quantization of the magneto-thermoelectric transport is studied when an external d.c. magnetic field is applied to the C/N-knot formed as crossing between a narrow stripe of conducting atomic monolayer C on the one hand, and a metal stripe N on the other hand. The temperature gradient in C is created by injecting the non-equilibrium electrons, holes and phonons from the heater H thereby directing them toward the C/N-knot. A non-linear coupling between electron states of the C/N-knot counter-electrodes causes splitting of the heat flow into several fractions owing to the Lorentz force acting in the C/N-knot vicinity, thereby inducing the magneto-thermoelectric current in N, whereas the phonons pass and propagate along C further ahead. The heat flow along C generates a transversal electric current in N showing a series of maxima when dimensions of the Landau orbits and the C/N-knot match each other. It allows observing the interplay between the quantum Hall effect and the spatial quantization.