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File:Cadmium arsenide STM.jpg

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Description (a) Large-scale topography map (Vbias = 2 V, Iset = 0.1 nA) showing a step-terrace morphology and (b) the topographic profile, taken along the dashed line shown in panel (a) with a step height of 0.718 nm, corresponding to approximately twice the As-As inter-layer distance perpendicular to the (112) plane. (c) Atomically resolved topography (Vbias = −100 mV, Iset = 1 nA) taken on a terrace, revealing a clear surface re-construction and (d) the corresponding 2D-FFT pattern showing peaks for the atomic surface lattice (circled in blue) of nearest- neighbor distance 0.435 (±0.02) nm and for the reconstruction (circled in red). (e) Tunneling spectroscopy measurements on the cleaved Cd3As2 (112) surface. An averaged dI/dV spectrum was acquired with a set-point of Vbias = −100 mV, Iset = 1 nA from the area shown in the topography image on the left (also taken with Vbias = −100 mV, Iset = 1 nA). The minimum in the dI/dV curve corresponds to the Dirac point (DP).
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Source http://www.nature.com/articles/srep12966
Author R. Sankar et al.
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current00:30, 4 December 2015Thumbnail for version as of 00:30, 4 December 2015926 × 1,008 (463 KB)Materialscientist (talk | contribs){{Information |Description=(a) Large-scale topography map (Vbias = 2 V, Iset = 0.1 nA) showing a step-terrace morphology and (b) the topographic profile, taken along the dashed line shown in panel (a) with a step height of 0.718 nm, corre...

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