We present a theoretical study of momentum-resolved tunneling between parallel two-dimensional conductors whose charge carriers have a (pseudo-)spin-1/2 degree of freedom that is strongly coupled to their linear orbital momentum. Specific examples are single and bilayer graphene as well as single-layer molybdenum disulphide. Resonant behavior of the differential tunneling conductance exhibited as a function of an in-plane magnetic field and bias voltage is found to be strongly affected by the (pseudo-)spin structure of the tunneling matrix. We discuss ramifications for the direct measurement of electronic properties such as Fermi surfaces and the dispersion curves. Furthermore, using a graphene double-layer structure as an example, we show how magneto-tunneling transport can be used to measure the pseudo-spin structure of tunnel matrix elements, thus enabling electronic characterization of the barrier material.
@article{arxiv.1308.6314,
title = {Magneto-tunnelling spectroscopy of chiral two-dimensional electron systems},
author = {L. Pratley and U. Zuelicke},
journal= {arXiv preprint arXiv:1308.6314},
year = {2013}
}
Comments
10 pages, 5 figures, RevTex 4.1, v2: expanded version with results added for transport in the non-linear regime and in tilted magnetic fields