Interference Effects Due to Commensurate Electron Trajectories and Topological Crossovers in (TMTSF)2ClO4

TL;DR

This paper presents experimental evidence for the interference commensurate (IC) effect in (TMTSF)2ClO4, revealing how electron wave functions undergo topological crossovers between one- and two-dimensional states as a function of magnetic field orientation.

Contribution

It provides the first experimental support for the IC effect in quasi-one-dimensional metals, linking magnetoresistance oscillations to topological electron wave function crossovers.

Findings

Observation of angle-dependent magnetoresistance oscillations.

Clear demarcation of behavior at resistance minima and maxima.

Evidence of 1D-2D topological crossovers in electron wave functions.

Abstract

We report angle-dependent magnetoresistance measurements on (TMTSF)2ClO4 that provide strong support for a new macroscopic quantum phenomenon, the interference commensurate (IC) effect, in quasi-one dimensional metals. In addition to observing rich magnetoresistance oscillations, and fitting them with one-electron calculations, we observe a clear demarcation of field-dependent behavior at local resistance minima and maxima (versus field angle). Anticipated by a theoretical treatment of the IC effect in terms of Bragg reflections in the extended Brillouin zone, this behavior results from 1D-2D topological crossovers of electron wave functions as a function of field orientation.