Evidence for proximity of YFe${}_2$Si${}_2$ to a magnetic quantum critical point

Abstract

Calculations of the electronic and magnetic properties of the non-magnetic metallic compound YFe${}_2$Si${}_2$ are reported. These show that at the density functional level a magnetic state involving ordering along the $c$-axis. The electronic structure is three dimensional, and is similar to that of the unconventional superconductor YFe${}_2$Ge${}_2$ and as well as that of the high pressure collapsed tetragonal phase of KFe${}_2$As${}_2$, which is also a superconductor. Based on the results in relation to experiment, we infer that properties of YFe${}_2$Si${}_2$ are strongly influenced by a nearby antiferromagnetic quantum critical point.

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Cited by in corpus (2)

• Competing magnetic orders in quantum critical Sr${}_3$Ru${}_2$O${}_7$
• Nearly ferromagnetic metal state in the collapsed tetragonal phase of YFe${}_2$(Ge,Si)${}_2$