Evidence for the coexistence of Dirac and massive carriers in a-(BEDT-TTF)2I3 under hydrostatic pressure

Abstract

Transport measurements were performed on the organic layered compound \aI3 under hydrostatic pressure. The carrier types, densities and mobilities are determined from the magneto-conductance of \aI3 . While evidence of high-mobility massless Dirac carriers has already been given, we report here, their coexistence with low-mobility massive holes. This coexistence seems robust as it has been found up to the highest studied pressure. Our results are in agreement with recent DFT calculations of the band structure of this system under hydrostatic pressure. A comparison with graphene Dirac carriers has also been done.

5 pages 5 figures

References in corpus (8)

• The electronic properties of graphene
• Ultrahigh electron mobility in suspended graphene
• Boron nitride substrates for high-quality graphene electronics
• Intrinsic and Extrinsic Performance Limits of Graphene Devices on SiO2
• Multicomponent fractional quantum Hall effect in graphene
• Tilted anisotropic Dirac cones in quinoid-type graphene and alpha-(BEDT-TTF)_2I_3
• Merging of Dirac points in a two-dimensional crystal
• Effects of the Zero-Mode Landau Level on Inter-Layer Magnetoresistance in Multilayer Massless Dirac Fermion Systems

Cited by in corpus (20)

• Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
• Anomalous Spin Correlations and Mass-Generating Excitonic Instability of Interacting Weyl Fermions
• Molecular Quantum Materials: Electronic Phases and Charge Dynamics in Two-Dimensional Organic Solids
• Effect of the type I to type II Weyl semimetal topological transition on superconductivity
• Pressure-dependent optical investigations of $\alpha$-(BEDT-TTF)${}_2$I${}_3$: tuning charge order and narrow gap towards a Dirac semimetal
• Longitudinal conductivity of massless fermions with tilted Dirac cone in magnetic field
• Magnetoplasmons of the tilted-anisotropic Dirac cone material $\alpha -$(BEDT-TTF)${}_2$I${}_3$
• Semimetallic and charge-ordered $\alpha$-(BEDT-TTF)${}_2$I${}_3$: on the role of disorder in dc transport and dielectric properties
• Correlation Effects on Charge Order and Zero-Gap State in the Organic Conductor α-(BEDT-TTF)2I3
• Magnetic properties of Type I and II Weyl Superconductors
• Pressure-induced phase switching of the Shubnikov de Haas oscillations in molecular Dirac fermion system $\alpha -$(BETS)${}_2$I${}_3$
• Electrically-induced phase transition in $\alpha$-(BEDT-TTF)${}_2$I${}_3$: Indications for high-mobility hot charge carriers
• Aperiodic quantum oscillations of particle-hole asymmetric Dirac cones
• Topological Properties of τ-Type Organic Conductors with a Checkerboard Lattice
• Dynamical gap generation in 2D Dirac semimetal with deformed Dirac cone
• Anisotropy of Dirac cones and van Hove singularity in an organic Dirac fermion system
• Tilted Dirac Cone Effect on Interlayer Magnetoresistance in α-(BEDT-TTF)${}_2$I${}_3$
• Anomalous scaling law for thermoelectric transport of 2D-confined electrons in an organic molecular system
• Long-wavelength optical phonon behavior in uniaxial strained graphene: Role of electron-phonon interaction
• Aslamazov Larkin Conductivity in Weyl Semimetals