Abstract
We calculate minimum feasible contact resistivities to n-type and p-type InAs and In <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.53</sub> Ga <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.47</sub> As. Resistivities were calculated for a range of Schottky barrier heights as well as for the case where the transmission probability is unity (Landauer limit). Calculations are compared with recent experimental data. Experimental contact resistivities for n-In <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.53</sub> Ga <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.47</sub> As and n-InAs lie within 2.5:1 of calculated resistivities given generally accepted values of Schottky barrier potential. Computed resistivities in the presence of a barrier are only 3.5:1 to 4:1 above Landauer limits.
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