Scaling Behavior of Angular Dependent Resistivity in CeCoIn$_5$: Possible Evidence for d-Wave Density Waves

TL;DR

This study investigates the angular dependence of resistivity in CeCoIn$_5$ crystals, revealing scaling behaviors consistent with d-wave density waves, which may indicate a new electronic ordering in this non-Fermi liquid material.

Contribution

It provides experimental evidence for d-wave density waves in CeCoIn$_5$ through detailed angular dependent resistivity measurements and analysis.

Findings

Identification of two distinct scaling regimes in resistivity

Dependence of ADR on perpendicular or parallel magnetic field components

Consistency of results with d-wave density wave theory

Abstract

In-plane angular dependent resistivity ADR was measured in the non-Fermi liquid regime of CeCoIn$_5$ single crystals at temperatures $T \le 20$ K and in magnetic fields $H$ up to 14 T. Two scaling behaviors were identified in low field region where resistivity shows T-linear dependence, separated by a critical angle $\theta_{c}$ which is determined by the anisotropy of CeCoIn$_5$; i.e., ADR depends only on the perpendicular (parallel) field component below (above) $\theta_c$. These scaling behaviors and other salient features of ADR are consistent with d-wave density waves.