Theory for Planar Hall Effect in Organic Dirac Fermion System

Abstract

In a recent experiment on the interlayer magnetoresistance in the quasi-two-dimensional organic salt, $\alpha$-(BEDT-TTF)${}_2$I${}_3$, it has been observed that at low temperatures, interlayer tunneling attains phase coherence, leading to the emergence of a three-dimensional electronic structure. Theoretically and experimentally it has been suggested that the system exhibits characteristics of a three-dimensional Dirac semimetal as a consequence of broken time-reversal symmetry and inversion symmetry. Here, we perform a theoretical calculation of the magnetoconductivity under an in-plane magnetic field and demonstrate that the system displays a planar Hall effect. Our calculations are based on a realistic model for $\alpha$-(BEDT-TTF)${}_2$I${}_3$ incorporating interlayer tunneling and the tilt of the Dirac cone. Given that the planar Hall effect is anticipated as a consequence of chiral anomaly, our findings provide support for the classification of $\alpha$-(BEDT-TTF)${}_2$I${}_3$ as a three-dimensional Dirac semimetal.

arXiv comment4 pages, 3 figures

References in corpus (25)

• Berry Phase Effects on Electronic Properties
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Type-II Weyl Semimetals
• Weyl Semimetal in a Topological Insulator Multilayer
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Dirac semimetal in three dimensions
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Observation of the chiral anomaly induced negative magneto-resistance in 3D Weyl semi-metal TaAs
• Chern semi-metal and Quantized Anomalous Hall Effect in HgCr2Se4
• Chiral Anomaly and Classical Negative Magnetoresistance of Weyl Metals
• Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
• Quantum Hall effects in a Weyl Semi-Metal: possible application in pyrochlore Iridates
• Signatures of the Adler-Bell-Jackiw chiral anomaly in a Weyl Fermion semimetal
• Berry phase effect in anomalous thermoelectric transport
• The chiral anomaly and thermopower of Weyl fermions in the half-Heusler GdPtBi
• Negative Magnetoresistance in Dirac Semimetal Cd3As2
• Pressure-Induced Zero-Gap Semiconducting State in Organic Conductor $\alpha$-(BEDT-TTF)${}_2$I${}_3$ Salt
• Chiral anomaly and transport in Weyl metals
• Chiral anomaly as origin of planar Hall effect in Weyl semimetals
• Giant Planar Hall Effect in Topological Metals
• Topological Surface States and Dirac point tuning in ternary Bi2Te2Se class of topological insulators
• Berry phase correction to electron density in solids and "exotic" dynamics
• Dynamical time-reversal and inversion symmetry breaking, dimensional crossover, and chiral anomaly in $\alpha$-(BEDT-TTF)${}_2$I${}_3$
• Coherent interlayer coupling in quasi-two-dimensional Dirac fermions in $\alpha$-(BEDT-TTF)${}_2$I${}_3$
• Tilted Dirac Cone Effect on Interlayer Magnetoresistance in α-(BEDT-TTF)${}_2$I${}_3$

Cited by in corpus (2)

• Three-Dimensional Topological Semimetal/Insulator States in α-Type Organic Conductors with Interlayer Spin-Orbit Interaction
• Wannier Center Analysis on Possible Three-Dimensional Topological Phases in α-Type Layered Organic Conductors