Technical Physics Letters

, Volume 42, Issue 3, pp 332–335 | Cite as

A model of axial heterostructure formation in III–V semiconductor nanowires

  • V. G. Dubrovskii


A kinetic model of the formation of axial heterostructures in nanocrystalline wires (nanowires, NWs) of III–V semiconductor compounds growing according to the vapor–liquid–solid (VLS) mechanism is proposed. A general system of nonstationary equations for effective fluxes of two elements of the same group (e.g., group III) is formulated that allows the composition profile of a heterostructure to be calculated as a function of the coordinate and epitaxial growth conditions, including the flux of a group V element. Characteristic times of the composition relaxation, which determine the sharpness of the heteroboundary (heterointerface), are determined in the linear approximation. A temporal interruption (arrest) of fluxes during the switching of elements for a period exceeding these relaxation times must increase sharpness of the heteroboundary. Model calculations of the composition profile in a double GaAs/InAs/GaAs axial heterostructure have been performed for various NW radii.


Technical Physic Letter Composition Profile Indium Content Group Versus Element Versus Semiconductor Compound 
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Copyright information

© Pleiades Publishing, Ltd. 2016

Authors and Affiliations

  1. 1.St. Petersburg Academic University, Nanotechnology Research and Education CenterRussian Academy of SciencesSt. PetersburgRussia
  2. 2.Ioffe Physical Technical InstituteRussian Academy of SciencesSt. PetersburgRussia
  3. 3.St. Petersburg State University of Information TechnologyMechanics and Optics (ITMO University)St. PetersburgRussia

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