Fractional electrical dimensionality in the spin solid phase of artificial honeycomb lattice

TL;DR

This study investigates the electrical properties of a low-temperature spin solid phase in an artificial honeycomb lattice, revealing fractional electrical dimensionality indicative of non-surface-like transport and strong insulation.

Contribution

It introduces the concept of fractional electrical dimensionality in the spin solid phase of artificial honeycomb lattices, linking magnetic order to electrical transport properties.

Findings

Fractional electrical dimensionality of 0.6 at low temperature.

Strong insulating behavior observed below 30 K.

Non-surface-like electrical transport in the spin solid phase.

Abstract

Two-dimensional artificial magnetic honeycomb lattice is at the forefront of research on unconventional magnetic materials. Among the many emergent magnetic phases that are predicted to arise as a function of temperature, the low temperature spin solid phase with zero magnetization and entropy is of special importance. Here, we report an interesting perspective to the consequence of spin solid order in an artificial honeycomb lattice of ultra-small connected elements using electrical dimensionality analysis. At low temperature, $T \leq$ 30 K, the system exhibits a very strong insulating characteristic. The electrical dimensionality analysis of the experimental data reveals a fractional dimensionality of $d$ = 0.6(0.04) in the spin solid phase of honeycomb lattice at low temperature. The much smaller electrical dimension in the spin solid phase, perhaps, underscores the strong insulating behavior in this system. Also, the fractional dimensionality in an otherwise two-dimensional system suggests a non-surface-like electrical transport at low temperature in an artificial honeycomb lattice.