Theoretical study of a two-dimensional electron gas in wurtzite ZnO/MgZnO heterostructures and comparison with experiment

Autor:	Woo-Pyo Hong, Doyeol Ahn, Jong-Jae Kim, Seoung-Hwan Park
Rok vydání:	2015
Předmět:	Condensed Matter::Materials Science Effective mass (solid-state physics) Materials science Condensed matter physics Impurity General Physics and Astronomy Heterojunction Electron Mole fraction Polarization (waves) Fermi gas Wurtzite crystal structure
Zdroj:	Journal of the Korean Physical Society. 67:1844-1847
ISSN:	1976-8524 0374-4884
DOI:	10.3938/jkps.67.1844
Popis:	The effect of polarization on a two-dimensional electron gas in the ZnO/MgZnO heterostructure were investigated by using an effective mass theory. The O-face MgZnO/ZnO structure is shown to have a larger sheet carrier density than the Zn-face structure. This can be explained by the fact that, in the case of the O-face, the ZnO layer is under tensile strain, and the strain-induced polarization is parallel to the orientation of the spontaneous polarization. The calculated results for the O-face agree well with the experiment. Also, the contribution of additional donor impurities on the electron sheet concentration is shown to be less effective when the Mg mole fraction is large.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ee2192d3952ea2ff5620b2fed6cf7309 https://doi.org/10.3938/jkps.67.1844 Zobrazit plný text záznamu Full text from SpringerLink