Magnetoresistance, noise properties and the Koshino-Taylor effect in the quasi-1D oxide KRu_4O_8

TL;DR

This study investigates the low temperature electronic transport and noise in the quasi-1D oxide KRu_4O_8, revealing a dominant Koshino-Taylor effect and strong carrier-lattice coupling, with implications for understanding low-dimensional oxide conductors.

Contribution

It provides experimental evidence of the Koshino-Taylor effect dominating resistivity in KRu_4O_8, highlighting impurity scattering over electronic correlations.

Findings

Resistivity varies quadratically with temperature and residual resistivity.

The Koshino-Taylor effect is significant in this material.

Resistance noise increases sharply, indicating strong carrier-lattice interactions.

Abstract

The low temperature electronic and galvanomagnetic transport properties of the low dimensional oxide KRu_4O_8 are experimentally considered. A quadratic temperature variation of the resistivity is observed to be proportional to the residual resistivity. It shows the role of inelastic electron scattering against impurities, i.e. a large Koshino-Taylor effect, rather than a consequence of strong electronic correlations. In the same temperature range, the Kohler rule is not fulfilled. The resistance noise increases also sharply, possibly due to a strong coupling of carriers with lattice fluctuations in this low dimensional compound.