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.

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

References in corpus (9)

• The electronic properties of graphene
• Current-induced cleaning of graphene
• Landau level spectroscopy of ultrathin graphite layers
• Infrared spectroscopy of Landau levels in graphene
• 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${}_3$

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• Nonlinear magnetoconductivity in Weyl and multi-Weyl semimetal in quantizing magnetic field
• Synthetic non-Abelian gauge fields and gravitomagnetic effects in tilted Dirac cone systems
• Intrinsic nonlinear thermal Hall transport of magnons: A Quantum kinetic theory approach
• Valley-dependent time evolution of coherent electron states in tilted anisotropic Dirac materials
• Electric field-induced valley degeneracy lifting in uniaxial strained graphene: evidence from magnetophonon resonance
• Aperiodic quantum oscillations of particle-hole asymmetric Dirac cones
• Lorentz-boost-driven magneto-optics in a Dirac nodal-line semimetal
• Electron Currents from Gradual Heating in Tilted Dirac Cone Materials
• 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
• Phase-space representation of coherent states generated through SUSY QM for tilted anisotropic Dirac materials
• An algorithm for exact analytical solutions for tilted anisotropic Dirac materials
• WKB energy levels in gapped graphene under crossed electromagnetic fields
• Landau levels and optical conductivity in the mixed state of a generic Weyl superconductor