Work

Collective formation of misfit dislocations at the critical thickness for equilibrium nanowire heterostructures

Year: 2023

Type: article

Abstract: In this work we model the evolution of strain energy during different growth stages of heterostructure nanowires. We find that the minimum energy configuration changes abruptly from fully elastically strained to partially relaxed due to collective formation of a misfit dislocation network. The transition at the critical thickness is associated with a characteristic density of misfits. These insights are gained from a technique developed to simulate misfit dislocations in a finite element framework, incorporating both elastic and plastic relaxation in a stationary heterostructure. We argue that these results have general relevance for mismatched heterostructures.

Source: Journal of Crystal Growth

DOI: 10.1016/j.jcrysgro.2023.127400

Authors: Tobias Særkjær, Thue Christian Thann, Sergej Schuwalow, Peter Krogstrup

Institution: University of Copenhagen

Language: English

Topic: Nanowire Synthesis and Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,990

Funders: European Research Council, H2020 European Research Council