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Knut Deppert

Knut Deppert

Professor

Knut Deppert

Controlled polytypic and twin-plane superlattices in iii-v nanowires.

Author

  • Philippe Caroff
  • Kimberly Dick Thelander
  • Jonas Johansson
  • Maria Messing
  • Knut Deppert
  • Lars Samuelson

Summary, in English

Semiconductor nanowires show promise for use in nanoelectronics, fundamental electron transport studies, quantum optics and biological sensing. Such applications require a high degree of nanowire growth control, right down to the atomic level. However, many binary semiconductor nanowires exhibit a high density of randomly distributed twin defects and stacking faults, which results in an uncontrolled, or polytypic, crystal structure. Here, we demonstrate full control of the crystal structure of InAs nanowires by varying nanowire diameter and growth temperature. By selectively tuning the crystal structure, we fabricate highly reproducible polytypic and twin-plane superlattices within single nanowires. In addition to reducing defect densities, this level of control could lead to bandgap engineering and novel electronic behaviour.

Department/s

  • Solid State Physics
  • Nanometer structure consortium (nmC)-lup-obsolete

Publishing year

2009

Language

English

Pages

50-55

Publication/Series

Nature Nanotechnology

Volume

4

Issue

1

Document type

Journal article

Publisher

Nature Publishing Group

Topic

  • Condensed Matter Physics

Status

Published

Research group

  • Nanometer structure consortium (nmC)-lup-obsolete

ISBN/ISSN/Other

  • ISSN: 1748-3395