Document Type
Article
Abstract
Diverse quantum phenomena have been observed in TSn4 transition metal (T) stannides, includ ing superconductivity, nontrivial topology, and large magnetoresistance (MR) at low temperat ures. Here, we report the experimental and theoretical investigation of tetragonal β-IrSn4 (space group I41/acd) with the lattice parameters a = 6.362(3) Å and c = 22.723(0) Å. The temperature dependence of the electrical resistivity indicates that β-IrSn4 is a good metal with Fermi-liquid behavior above the superconducting transition at Tc ∼ 0.7 K. Magnetic susceptibility measure ments indicate it is non-magnetic. However, positive transverse MR with linear field dependence is observed. At T = 2 K and µ0H = 14T, the MRreaches 700% without sign of saturation. Shubnikov–de Haas oscillations are observed from proximity detector oscillator measurements up to 60 T. We experimentally extract several frequencies, and through comparison to first-principles calculations, identify corresponding electronic bands. For H // c, two strong oscillations, F1 ≈ 109 and F2 ≈ 302 T,allow us to determine effective masses 0.266m0 and 0.300m0 (m0 is the free electron mass), respectively. The topology of these bands is discussed.
Digital Object Identifier (DOI)
Publication Info
Published in Journal of Physics: Condensed Matter, Volume 38, Issue 5, 2026.
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APA Citation
Speer, S., Pershin, Y. V., Blawat, J., Singleton, J., & Jin, R. (2026). Large magnetoresistance and quantum oscillations observed in superconducting β -IrSn 4. Journal of Physics: Condensed Matter, 38(5), 055702.https://doi.org/10.1088/1361-648x/ae3c4a