Bulk superconductivity in the kagome metal YRu3B2

TL;DR

This paper reports the discovery of bulk superconductivity at 0.7 K in the kagome metal YRu3B2, highlighting the role of the kagome lattice structure in facilitating superconductivity.

Contribution

It demonstrates superconductivity in YRu3B2, a structurally pristine kagome metal, expanding understanding of kagome-related superconductivity.

Findings

Superconductivity observed at Tc = 0.7 K in YRu3B2

Bulk measurements confirm the superconducting transition

YRu3B2 has a pristine kagome lattice structure

Abstract

Materials with a kagome sublattice have been heavily studied recently for their exotic electronic band structure, structural frustration, high-temperature charge order transitions, and unconventional electron-phonon coupling. In LaRu3Si2, it was proposed that electronic flat bands conspire with the characteristic phonon spectrum of the kagome lattice to drive enhanced superconductivity at Tc = 7 K. Here, we report bulk superconductivity in the structural analogue YRu3B2, which hosts a structurally pristine kagome lattice. We observe a superconducting transition at Tc = 0.7 K through magnetization, resistivity, and heat-capacity measurements in this novel kagome metal.