Superconductivity and magnetism in YFe2Ge2

David J. Singh

doi:10.1103/PhysRevB.89.024505

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Superconductivity and magnetism in YFe2Ge2

David J. Singh

DOI 10.1103/PhysRevB.89.024505 · Physical Review B

T1

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Abstract

We report calculations of the electronic structure and magnetic properties of YFe2Ge2 and discuss the results in terms of the observed superconductivity near magnetism. We find that YFe2Ge2 is a material near a magnetic quantum critical point based on comparison of standard density functional results that predict magnetism with experiment. The band structure and Fermi surfaces are very three dimensional and higher conductivity is predicted in the c-axis direction. The magnetism is of Stoner type and is predominately from an in-plane ferromagnetic tendency. The interlayer coupling is weak giving a perhaps two dimensional character to the magnetism, which is in contrast to the conductivity and may be important for suppressing the ordering tendency. This is compatible with a triplet superconducting state mediated by spin fluctuations.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YFe2Ge2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown