Eur. Phys. J. Special Topics 222, 1257-1262 (2013)
https://doi.org/10.1140/epjst/e2013-01919-7

Regular Article

Semi-metals and the Topological Insulator Interlayer tunneling spectroscopy of graphite at high magnetic field oriented parallel to the layers

¹ Kotelnikov Institute of Radio Engineering and Electronics of RAS, Mokhovaya 11-7, Moscow 125009, Russia
² Institut Néel, CNRS, 25 rue des Martyrs, BP. 166, 38042 Grenoble, France
³ Laboratoire National des Champs Magnétiques Intenses–Toulouse, CNRS, 143 avenue de Rangueil, 31400 Toulouse, France
⁴ Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA

Received: 18 March 2013
Revised: 12 May 2013
Published online: 15 July 2013

Abstract

Interlayer tunneling in graphite mesa-type structures is studied at a strong in-plane magnetic field H up to 55 T and low temperature T = 1.4 K. The tunneling spectrum dI/dV vs. V has a pronounced peak at a finite voltage V₀. The peak position V₀ increases linearly with H. To explain the experiment, we develop a theoretical model of graphite in the crossed electric E and magnetic H fields. When the fields satisfy the resonant condition E = vH, where V is the velocity of the two-dimensional Dirac electrons in graphene, the wave functions delocalize and give rise to the peak in the tunneling spectrum observed in the experiment.