Supporting information for Magnetic Doping and Kondo Effect in Bi2Se3 Nanoribbons

Using Fe-Au and Ni-Au thin films as catalysts for the VLS growth of Bi 2 Se 3 nanoribbons, we obtain two distinct morphologies in the case of Fe-Au thin films and three distinct morphologies in the case of Ni-Au thin films. For Fe-doped Bi 2 Se 3 nanoribbons, we observe wide nanoribbons (Fig. S1(c,d)) and narrow, long nanoribbons (Fig. S1(e,f)). For Ni-doped Bi 2 Se 3 nanoribbons, we observe wide nanoribbons (Fig. S1(j)), narrow, long nanoribbons (Fig. S1(h)), and nanorods with rough side surfaces (Fig. S1(g,i)). The nanorods consist of thin platelets that are stacked together along the axis of the nanowire.