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Multiband electronic transport in α-Yb_(1-x)Sr_(x)AlB₄ [x = 0, 0.19(3)] single crystals
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Multiband electronic transport in α-Yb_(1-x)Sr_(x)AlB₄ [x = 0, 0.19(3)] single crystals
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We report on the evidence for the multiband electronic transport in $\alpha$-YbAlB$_{4}$ and $\alpha$-Yb$_{0.81(2)}$Sr$_{0.19(3)}$AlB$_{4}$. Multiband transport reveals itself below 10 K in both compounds via Hall effect measurements, whereas anisotropic magnetic ground state sets in below 3 K in $\alpha$-Yb$_{0.81(2)}$Sr$_{0.19(3)}$AlB$_{4}$. Our results show that Sr$^{2+}$ substitution enhances conductivity, but does not change the quasiparticle mass of bands induced by heavy fermion hybridization.
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