Electric-field-induced lifting of the valley degeneracy in alpha-(BEDT-TTF)_2I_3 Dirac-like Landau levels

Abstract

The relativistic Landau levels in the layered organic material alpha-(BEDT-TTF)_2I_3 [BEDT-TTF=bis(ethylenedithio)tetrathiafulvalene] are sensitive to the tilt of the Dirac cones, which, as in the case of graphene, determine the low-energy electronic properties under appropriate pressure. We show that an applied inplane electric field, which happens to be in competition with the tilt of the cones, lifts the twofold valley degeneracy due to a different level spacing. The scenario may be tested in infrared transmission spectroscopy.

arXiv comment4 pages, 1 figure; version with minor corrections published in EPL

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• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
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• Current-induced cleaning of graphene
• Landau level spectroscopy of ultrathin graphite layers
• Infrared spectroscopy of Landau levels in graphene
• Pressure-Induced Zero-Gap Semiconducting State in Organic Conductor $\alpha$-(BEDT-TTF)${}_2$I${}_3$ Salt
• Tilted anisotropic Dirac cones in quinoid-type graphene and alpha-(BEDT-TTF)_2I_3
• Novel electric field effects on Landau levels in Graphene
• Anomalous Orbital Magnetism and Hall Effect of Massless Fermions in Two Dimension
• Possible Verification of Tilted Anisotropic Dirac Cone in α-(BEDT-TTF)_2 I_3 Using Interlayer Magnetoresistance
• Electronic Properties Close to Dirac Cone in Two-Dimensional Organic Conductor $\alpha$-(BEDT-TTF)${}_2$I${}_3$
• Theory of the Breakdown of the Quantum Hall Effect
• Field-induced breakdown of the quantum Hall effect

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• Electric field assisted amplification of magnetic fields in tilted Dirac cone systems
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• 2D Weyl Materials in the Presence of Constant Magnetic Fields
• Density of states and differential entropy in Dirac materials in crossed magnetic and in-plane electric fields
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