# Evidence of density waves in single crystalline nanowires of Pyrochlore Iridates

## TL;DR

This study provides experimental evidence of density wave phenomena in single crystalline Pyrochlore Iridate nanowires, revealing nonlinear conduction, multiple relaxation processes, and potential links to Weyl semimetal states.

## Contribution

First demonstration of density wave instability in low-dimensional Pyrochlore Iridate nanowires with detailed transport analysis.

## Key findings

- Electric field induces hysteretic switching of the density wave.
- Presence of four collective relaxation processes at different temperatures.
- Linear scaling of dc conductivity with relaxation rate.

## Abstract

We present experimental evidence of emergent density wave instability in single crystalline low dimensional wires of Yittrium based Pyrochlore Iridates. We demonstrate electric field induced nonlinear hysteretic switching of the density wave at low temperature, followed by smooth nonlinear conduction at higher temperature (T > 40 K) in $Y_{2-x}Bi_{x}Ir_{2}O_{7}$ with x = 0 and 0.3. AC transport measurements reveal the presence of four different collective relaxation processes which dominate at different temperature scales. There is a strong coupling of the normal charge carriers with the density wave condensate, which is reflected in the linear scaling of the dc conductivity with the collective relaxation rate across a wide range of frequency and temperature regime. The evidence of density wave in low dimensional single crystals of Pyrochlore Iridate could be a precursor to the possible experimental confirmation of the Weyl semimetallic ground state with broken chiral symmetry.