U3Bi4Ni3 is reported to be a Kondo insulator with a metallic surface state that dominates transport below 150 K and carries roughly ten times more current than the bulk at low temperature.
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High temperature surface state in Kondo insulator U$_3$Bi$_4$Ni$_3$
U3Bi4Ni3 is reported to be a Kondo insulator with a metallic surface state that dominates transport below 150 K and carries roughly ten times more current than the bulk at low temperature.