Modification of Electronic Structure of n-GaN(0001) Surface by N⁺-Ion Bombardment

• Authors: M. Grodzicki , P. Mazur , A. Ciszewski
• Languages of publication: EN

Abstracts

EN

The electronic structure of n-type GaN(0001) surface and its modification by N⁺ ion bombardment are presented in this report. The studies were carried out in situ in ultrahigh vacuum by ultraviolet photoelectron spectroscopy, X-ray photoelectron spectroscopy, and low-energy electron diffraction. Low-energy N⁺ ion bombardment, which was done using an ion gun at an energy of 200 eV, leads to nitriding of the surface. The process changes the surface stoichiometry and, consequently, provides formation of a disordered altered GaN layer. The calculated electron affinity of the clean n-GaN surface of 3.4 eV and band bending of 0.2 eV became changed after bombardment to 2.9 eV and 0.8 eV, respectively. The obtained difference in valence band maximum between the clean sample and the bombarded one was 0.6 eV.

Keywords

EN

68.47.Fg; 73.30.+y; 82.80.Pv

Discipline

• 82.80.Pv: Electron spectroscopy (X-ray photoelectron (XPS), Auger electron spectroscopy (AES), etc.)
• 68.47.Fg: Semiconductor surfaces
• 73.30.+y: Surface double layers, Schottky barriers, and work functions(see also 82.45.Mp Thin layers, films, monolayers, membranes in electrochemistry; see also 87.16.D- Membranes, bilayers, and vesicles in biological physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 132
• Issue: 2
• Pages: 351-353

Dates

published

2017-08

Contributors

author

M. Grodzicki

• Institute of Experimental Physics, University of Wrocław, pl. M. Borna 9, Wrocław, Poland

author

P. Mazur

• Institute of Experimental Physics, University of Wrocław, pl. M. Borna 9, Wrocław, Poland

author

A. Ciszewski

• Institute of Experimental Physics, University of Wrocław, pl. M. Borna 9, Wrocław, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.132.351