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Exciton Spectroscopy of Hexagonal BN Using Non-Resonant X-Ray Raman Scattering



Y Feng, J A. Soininen, A L. Ankudinov, J O. Cross, Gerald T. Seidler, A T. Macrander, J J. Rehr, Eric L. Shirley


We report non-resonant x-ray Raman scattering (XRS) measurements from hexagonal BN for transferred momentum from 2 Angstrom} -1 to 9 Angstrom}-1 along directions both in and out of the basal plane. A symmetry-based argument together with calculations of the projected density of states in the spherical harmonics basis reveals that a strong pre-edge feature is a dominantly Y 10-type exciton with no other s-c p-, or d- components. This conclusion is supported by a second, independent calculation of the q-dependent XRS cross-section. This exciton spectroscopy may be applied to a range of other systems.
Physica Scripta


exciton, non-resonant x-ray raman scattering, reflection symmetry


Feng, Y. , Soininen, J. , Ankudinov, A. , Cross, J. , Seidler, G. , Macrander, A. , Rehr, J. and Shirley, E. (2008), Exciton Spectroscopy of Hexagonal BN Using Non-Resonant X-Ray Raman Scattering, Physica Scripta, [online], (Accessed April 19, 2024)
Created April 7, 2008, Updated October 12, 2021