Multidimensional Nature of Molecular Organic Conductors Revealed by Angular Magnetoresistance Oscillations

TL;DR

This study investigates the complex multidimensional electronic behaviors of organic conductors using angle-dependent magnetoresistance measurements and computational modeling, revealing detailed insights into their crystal structure and electron dynamics.

Contribution

It provides a combined experimental and computational analysis of magnetoresistance oscillations in (DMET)2I3, highlighting its multidimensional electronic nature and the dimensional crossovers.

Findings

Revealed 1D, 2D, and 3D electronic behaviors in (DMET)2I3

Validated transfer integrals through Boltzmann transport calculations

Identified dimensional crossovers in electronic behavior

Abstract

Angle dependent magnetoresistance experiments on organic conductors exhibit a wide range of angular oscillations associated with the dimensionality and symmetry of the crystal structure and electron energy dispersion. In particular, characteristics associated with 1, 2, and 3 dimensional electronic motion are separately revealed when a sample is rotated through different crystal planes in a magnetic field. Originally discovered in the TMTSF based conductors, these effects are particularly pronounced in the related system (DMET)2I3. Here, experimental and computational results for magnetoresistance oscillations in this material, over a wide range of magnetic field orientations, are presented in such a manner as to uniquely highlight this multidimensional behavior.The calculations employ the Boltzmann transport equation that incorporates the systems triclinic crystal structure, which allows for accurate estimates of the transfer integrals along the crystallographic axes, verifying the 1d, 2d and 3d nature of (DMET)2I3, as well as crossovers between dimensions in the electronic behavior.