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• W3014106020 abstract "In this letter, we have examined the superconducting ground state of the HfV$_2$Ga$_4$ compound using resistivity, magnetization, zero-field (ZF) and transverse-field (TF) muon-spin relaxation and rotation ($mu$SR) measurements. Resistivity and magnetization unveil the onset of bulk superconductivity with $T_{bf c}sim$ 3.9~K, while TF-$mu$SR measurements show that the temperature dependence of the superfluid density is well described by a nodal two-gap $s$+$d$-wave order parameter model. In addition, ZF muon relaxation rate increases with decreasing temperature below 4.6 K, indicating the presence of weak spin fluctuations. These observations suggest an unconventional multiband nature of the superconductivity possibly arising from the distinct $d$-bands of V and Hf ions with spin fluctuations playing an important role. To better understand these findings, we carry out first-principles electronic-structure calculations, further highlighting that the Fermi surface consists of multiple disconnected sheets with very different orbital weights and spin-orbit coupling, bridging the way for a nodal multiband superconductivity scenario. In this vein, therefore, HfV$_2$Ga$_4$-family stands out as an open avenue to novel unexplored unconventional superconducting compounds, such as ScV$_2$Ga$_4$ and ZrV$_2$Ga$_4$, and other many rare earths based materials." @default.
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• W3014106020 date "2020-04-01" @default.
• W3014106020 modified "2023-10-15" @default.
• W3014106020 title "Two-band superconductivity with unconventional pairing symmetry in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>HfV</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Ga</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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• W3014106020 doi "https://doi.org/10.1103/physrevresearch.2.022001" @default.
• W3014106020 hasPublicationYear "2020" @default.
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