Electronic Raman Studies of Shallow Donors in Silicon Carbide

Conference contribution


Publication Details

Author(s): Püsche R, Hundhausen M, Ley L, Semmelroth K, Pensl G, Desperrier P, Wellmann P, Haller EE, Ager J, Starke U
Editor(s): Robert P. Devaty, David J. Larkin and Stephen E. Saddow
Publisher: Trans Tech Publications
Publication year: 2006
Volume: 527-529
Conference Proceedings Title: Materials Science Forum (Volumes 527-529)
Pages range: 579
ISSN: 0255-5476
eISSN: 1662-9752
Language: English


Abstract


We study electronic Raman scattering of phosphorus and nitrogen doped silicon carbide (SiC) as a function of temperature in the range 7 K < T < 300K. We observe a series of peaks in the Raman spectra which we assign to electronic transitions at nitrogen and phosphorus donors on different lattice sites. These transitions are identified as valley orbit transitions of the Is donor ground state. From the polarization dependence of the observed peaks, we find that all electronic Raman signals have E2-symmetry of C 6v for the hexagonal polytypes (6H-SiC and 4H-SiC) and E-syinmetry of C3., for 15R-SiC. Wc find a reduction of the intensities of all valley-orbit Raman signals with increasing temperature and ascribe this reduction to the decreasing occupation of donor states.



FAU Authors / FAU Editors

Hundhausen, Martin apl. Prof. Dr.
Lehrstuhl für Laserphysik
Ley, Lothar Prof. Dr.
Naturwissenschaftliche Fakultät
Wellmann, Peter Prof. Dr.-Ing.
Professur für Werkstoffwissenschaften (Werkstoffe der Elektrotechnik)


How to cite

APA:
Püsche, R., Hundhausen, M., Ley, L., Semmelroth, K., Pensl, G., Desperrier, P.,... Starke, U. (2006). Electronic Raman Studies of Shallow Donors in Silicon Carbide. In Robert P. Devaty, David J. Larkin and Stephen E. Saddow (Eds.), Materials Science Forum (Volumes 527-529) (pp. 579). Pittsburgh, Pennsylvania, US: Trans Tech Publications.

MLA:
Püsche, Roland, et al. "Electronic Raman Studies of Shallow Donors in Silicon Carbide." Proceedings of the International Conference on Silicon Carbide and Related Materials (ICSCRM 2005), Pittsburgh, Pennsylvania Ed. Robert P. Devaty, David J. Larkin and Stephen E. Saddow, Trans Tech Publications, 2006. 579.

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Last updated on 2018-19-04 at 02:47