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. 2013 Dec 18;4:3010. doi: 10.1038/ncomms4010

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(a) Powder X-ray diffraction pattern of an SmB₆ crystal. Solid line is the Rietveld fitting using the TOPAS software. The s.d. is negligible. (b) The temperature dependence of resistance at zero field and 14 T. A negative magnetoresistance is observed in the low temperature region, while it becomes positive in the high temperature region. (c) The magnetoresistance of SmB₆ taken at 2 K. A negative magnetoresistance is obvious here. (d) LEED pattern of the cleaved SmB₆ (001) surface. Bright spots in square lattice reflect the pristine 1 × 1 surface, with a lattice constant of 4.13 Å. (e) Bulk and surface projected Brillouin zone of SmB₆ and the high symmetry points.