Mechanical properties of Ge nanowire

ORAL

Abstract

Nanowires possess unique properties owing to their low dimensionality and high surface-to-volume ratio. Although numerous calculations exist for the electronic properties of nanowires, the mechanical properties have not been addressed to the same extent. Here, we present real-space pseudopotential calculations for the mechanical properties of Ge nanowires. In particular, we examine three different orientations of Ge nanowires, with the axis along the [111], [110], and [100] directions. We present calculations for the elastic properties as a function of wire diameter. We find that Young's modulus is decreased as the surface-to-volume ratio increases, except for the [110] orientation, which shows the opposite trend. In addition, we will discuss the band structure under strain for each nanowire system.

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Authors

  • Alex Lee

    The University of Texas at Austin

  • Minjung Kim

    The University of Texas at Austin, Institute for Computational Engineering and Sciences and Department of Chemical Engineering, The University of Texas at Austin

  • James Chelikowsky

    The University of Texas at Austin, University of Texas, University of Texas at Austin, Institute for Computational Engineering and Sciences, The University of Texas at Austin, Institute for Computational Engineering and Sciences and Departments of Chemical Engineering and Physics, The University of Texas at Austin, UT Austin