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arXiv · 1904.09893

Magnetotransport in Al6Re

Erjian Cheng·Darren C. Peets·Chuanying Xi·Yeyu Huang·Li Pi·Shiyan Li
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Abstract

Since very few Type-I superconductors are known and most are elemental superconductors, there are very few experimental platforms where the interaction between Type-I superconductivity and topologically nontrivial band structure can be probed. The rhenium aluminide Al$_6$Re has recently been identified as a Type-I superconductor with a transition of 0.74\,K and a critical field of $\sim$50\,Oe. Here, we report its magnetotransport behavior including de Haas-van Alphen (dHvA) and Shubnikov-de Haas (SdH) oscillations. Angular dependence of the magnetoresistance reveals a highly anisotropic Fermi surface with dominant hole character. From the strong oscillatory component $ΔR_{xx}$ in high magnetic fields up to 33\,T, the Landau index infinite-field intercept in the case of a single oscillation frequency, and the phase factor $φ$ where multiple frequencies coexist, are both $\sim$1/4. This intermediate value is suggestive of possible nontrivial band topology but does not allow strong conclusions.

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Erjian Cheng, Darren C. Peets, Chuanying Xi, Yeyu Huang, Li Pi, Shiyan Li. 2019-08-13. Magnetotransport in Al6Re. https://doi.org/10.1103/physrevb.100.054509

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