Renormalization Effects on Quasi-Two-Dimensional Organic Conductor α-(BEDT-TTF)2I3

Abstract

The quasi-two-dimensional organic semiconductor α-(BEDT-TTF)2I3 [BEDT-TTF=bis(ethylenedithio)tetrathiafulvalene] has an anisotropic linear dispersion with a zero energy gap near the Fermi level. Owing to the vanishing density of states at the Fermi level, the Coulomb interaction is unscreened in this material. We theoretically study the effect of the long-range Coulomb interaction and the low-energy/long-wavelength behavior of α-(BEDT-TTF)2I3 using the renormalization group analysis. The nearly logarithmic enhancement of the velocity reshapes tilted Dirac cones, and changes the low-temperature behavior. We also show the theoretical calculation for the site-selective spin susceptibility, which can be measured in an NMR experiment.

4 pages, 5 figures

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Cited by in corpus (20)

• Dirac materials
• Possible correlated insulating states in magic-angle twisted bilayer graphene under strongly competing interactions
• Nodal Arc in Disordered Dirac Fermions: Connection to Non-Hermitian Band Theory
• Observation of an anisotropic Dirac cone reshaping and ferrimagnetic spin polarization in an organic conductor
• Anomalous Spin Correlations and Mass-Generating Excitonic Instability of Interacting Weyl Fermions
• Coulomb interaction effect in tilted Weyl fermion in two dimensions
• Effects of the Dirac cone tilt in two-dimensional Dirac semimetal
• Synthetic non-Abelian gauge fields and gravitomagnetic effects in tilted Dirac cone systems
• Correlation Effects on Charge Order and Zero-Gap State in the Organic Conductor α-(BEDT-TTF)2I3
• Condition for the emergence of a bulk Fermi arc in disordered Dirac-fermion systems
• Excitonic instability of two-dimensional tilted Dirac cones
• Type-III Dirac Cones from Degenerate Directionally Flat Bands: Viewpoint from Molecular-Orbital Representation
• On the renormalization of Coulomb interactions in two-dimensional tilted Dirac fermions
• Dynamical gap generation in 2D Dirac semimetal with deformed Dirac cone
• Interplay between tilt, disorder, and Coulomb interaction in type-I Dirac fermions
• Renormalization Group Approach to Stability of Two-dimensional Interacting Type-II Dirac Fermions
• Effect of Long-Range Coulomb Interaction on NMR Shift in Massless Dirac Electrons of Organic Conductor
• Effect of Interlayer Spin-Flip Tunneling for Interlayer Magnetoresistance in Multilayer Massless Dirac Fermion Systems
• Quantum Criticality of Type-I and Critically Tilted Dirac Semimetals
• Long-range Coulomb interaction effects on the surface Dirac electron system of a three-dimensional topological insulator