Skip to main content Accessibility help
×
Home
Hostname: page-component-559fc8cf4f-6f8dk Total loading time: 0.273 Render date: 2021-03-04T21:26:20.622Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": false, "newCiteModal": false, "newCitedByModal": true }

Phonon modes, dielectric constants, and exciton mass parameters in ternary MgxZn1−xO

Published online by Cambridge University Press:  01 February 2011

Carsten Bundesmann
Affiliation:
bundesm@physik.uni-leipzig.de, Universitaet Leipzig, Institut fuer Experimentelle Physik II, Linnéstr. 5, Leipzig, -, 04103, Germany
Michael Lorenz
Affiliation:
mlorenz@physik.uni-leipzig.de, Universität Leipzig, Institut für Experimentelle Physik II, Leipzig, N/A, 04103, Germany
Marius Grundmann
Affiliation:
grundmann@physik.uni-leipzig.de, Universität Leipzig, Institut für Experimentelle Physik II, Leipzig, N/A, 04103, Germany
Mathias Schubert
Affiliation:
schubert@engr.unl.edu, University Nebraska-Lincoln, Department of Electrical Engineering, and Center for Materials Research and Analysis, Lincoln, Nebraska, 68588-0511, United States
Get access

Abstract

The long-wavelength optical phonons and dielectric constants of PLD-grown MgxZn1−xO films are studied by combination of infrared spectroscopic ellipsometry and Raman scattering spectroscopy. The ternary alloy MgxZn1−xO exhibits a phase transition with change of coordination number from four-fold coordinated, hexagonal wurtzite structure (ZnO) to six-fold coordinated, cubic rocksalt structure (MgO). It is found that both phonon mode frequencies and dielectric constants change abruptly upon phase transition, which is assigned to the change of coordination number. The change of dielectric constants can be related to the change of electronic properties, for instance, the exciton binding energy. In a simple approach, the exciton binding energy depends on the reduced exciton mass and the static dielectric constant. By comparison with experimental values of the exciton binding energies it is found that the reduced exciton mass must increase by a factor of about two upon face transition from wurtzite to rocksalt structure.

Type
Research Article
Copyright
Copyright © Materials Research Society 2006

Access options

Get access to the full version of this content by using one of the access options below.

References

[1] Bundesmann, C., Schubert, M., Spemann, D., Butz, T., Lorenz, M., Kaidashev, E. M., Grundmann, M., Ashkenov, N., Neumann, H., and Wagner, G., Appl. Phys. Lett. 81, 2376 (2002).CrossRefGoogle Scholar
[2] Bundesmann, C., Schubert, M., Spemann, D., Rahm, A., Hochmuth, H., Lorenz, M., and Grundmann, M., Appl. Phys. Lett. 85, 905 (2004).CrossRefGoogle Scholar
[3] Bundesmann, C., Phonons and plasmons in ZnO-based alloy and doped ZnO thin films studied by infrared spectroscopic ellipsometry and Raman scattering spectroscopy, PhD Thesis, Universität Leipzig, 2005 (Shaker, Aachen, 2006).Google Scholar
[4] Bundesmann, C., Rahm, A.. Lorenz, M., Grundmann, M., Schubert, M.. J. Appl. Phys, in press (2006).Google Scholar
[4] Lorenz, M., Kaidashev, E. M., Wenckstern, H. von, Riede, V., Bundesmann, C., Spemann, D., Benndorf, G., Hochmuth, H., Rahm, A., Semmelhack, H.-C., and Grundmann, M. Solid State Electronics 47, 22052209 (2003).CrossRefGoogle Scholar
[5] Spemann, D., Kaidashev, E. M., Lorenz, M., Vogt, J., and Butz, T., Nucl. Instr. Meth. B 219–220, 891 (2004).CrossRefGoogle Scholar
[6] Schubert, M., Infrared Ellipsometry on Semiconductor Layer Structures - Phonons, Plasmons, and Polaritons (Springer, Berlin, 2004).Google Scholar
[7] Chen, J. and Shen, W. Z., Appl. Phys. Lett. 83, 2154 (2003).CrossRefGoogle Scholar
[8] Serrano, J., Romero, A. H., Manjon, F. J., Lauck, R., Cardona, M., and Rubio, A., Phys. Rev. B 69, 094306 (2004).CrossRefGoogle Scholar
[9] Lucovsky, G., Brodsky, M. H., and Burstein, E., Phys. Rev. B 2, 3295 (1970).CrossRefGoogle Scholar
[10] Schmidt, R., Rheinländer, B., Schubert, M., Spemann, D., Butz, T., Lenzner, J., Kaidashev, E. M., Lorenz, M., Rahm, A., Semmelhack, H. C., and Grundmann, M., Appl. Phys. Lett. 82, 2260 (2003).CrossRefGoogle Scholar
[11] Schmidt-Grund, R., Carstens, A., Schubert, M., Rheinländer, B., Spemann, D., Hochmuth, H., Lorenz, M., Herzinger, C. M., and Grundmann, M., submitted (2005).Google Scholar

Full text views

Full text views reflects PDF downloads, PDFs sent to Google Drive, Dropbox and Kindle and HTML full text views.

Total number of HTML views: 0
Total number of PDF views: 7 *
View data table for this chart

* Views captured on Cambridge Core between September 2016 - 4th March 2021. This data will be updated every 24 hours.

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Phonon modes, dielectric constants, and exciton mass parameters in ternary MgxZn1−xO
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

Phonon modes, dielectric constants, and exciton mass parameters in ternary MgxZn1−xO
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

Phonon modes, dielectric constants, and exciton mass parameters in ternary MgxZn1−xO
Available formats
×
×

Reply to: Submit a response


Your details


Conflicting interests

Do you have any conflicting interests? *