Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.3579423
Title: Ambiguity in the magnitude and direction of the derived interface dipole in lanthanum aluminate heterostructures: Implications and proposed solution
Authors: Liu, Z.Q.
Chim, W.K. 
Chiam, S.Y.
Pan, J.S.
Ng, C.M.
Issue Date: 1-May-2011
Source: Liu, Z.Q., Chim, W.K., Chiam, S.Y., Pan, J.S., Ng, C.M. (2011-05-01). Ambiguity in the magnitude and direction of the derived interface dipole in lanthanum aluminate heterostructures: Implications and proposed solution. Journal of Applied Physics 109 (9) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.3579423
Abstract: The electric field strength of interface dipoles cannot be measured directly but can be derived from measurable electronic properties such as the valence band offset (VBO) and electron affinity using photoemission techniques. In this study, we found that the measurements of these two values are affected by differential charging and surface contaminants, respectively. This can affect both the polarity and the strength of the derived interface dipole and therefore might have implications regarding the understanding of oxide-semiconductor band alignment. Our overall band lineup and derived interface dipole in lanthanum aluminate (LAO) heterostructures agree excellently with a popular charge-neutrality level model. This would not be possible without the accurate measurement of VBO and electron affinity in LAO heterostructures. © 2011 American Institute of Physics.
Source Title: Journal of Applied Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/54971
ISSN: 00218979
DOI: 10.1063/1.3579423
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

7
checked on Dec 13, 2017

WEB OF SCIENCETM
Citations

5
checked on Dec 13, 2017

Page view(s)

29
checked on Dec 9, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.