Exploring crystal phase switching in GaP nanowires

S. Assali, L. Gagliano, D.S. Oliveira, M.A. Verheijen, S.R. Plissard, L.F. Feiner, E.P.A.M. Bakkers

Research output: Contribution to journalArticleAcademicpeer-review

39 Citations (Scopus)
4 Downloads (Pure)

Abstract

The growth of wurtzite/zincblende (WZ and ZB, respectively) superstructures opens new avenues for band structure engineering and holds the promise of digitally controlling the energy spectrum of quantum confined systems. Here, we study growth kinetics of pure and thus defect-free WZ/ZB homostructures in GaP nanowires with the aim to obtain monolayer control of the ZB and WZ segment lengths. We find that the Ga concentration and the supersaturation in the catalyst particle are the key parameters determining growth kinetics. These parameters can be tuned by the gallium partial pressure and the temperature. The formation of WZ and ZB can be understood with a model based on nucleation either at the triple phase line for the WZ phase or in the center of the solid-liquid interface for the ZB phase. Furthermore, the observed delay/offset time needed to induce WZ and ZB growth after growth of the other phase can be explained within this framework.

Original languageEnglish
Pages (from-to)8062-8069
Number of pages8
JournalNano Letters
Volume15
Issue number12
DOIs
Publication statusPublished - 9 Dec 2015

Keywords

  • gallium phosphide
  • monolayer growth
  • semiconductor nanowire
  • supersaturation
  • wurtzite
  • zincblende

Fingerprint Dive into the research topics of 'Exploring crystal phase switching in GaP nanowires'. Together they form a unique fingerprint.

  • Cite this

    Assali, S., Gagliano, L., Oliveira, D. S., Verheijen, M. A., Plissard, S. R., Feiner, L. F., & Bakkers, E. P. A. M. (2015). Exploring crystal phase switching in GaP nanowires. Nano Letters, 15(12), 8062-8069. https://doi.org/10.1021/acs.nanolett.5b03484