| Author(s): |
Y Feng; J A. Soininen; A L. Ankudinov; J O. Cross; G T. Seidler; A T. Macrander; J J. Rehr; Eric L. Shirley; |
| Title: |
Exciton Spectroscopy of Hexagonal BN Using Non-Resonant X-Ray Raman Scattering |
| Published: |
April 08, 2008 |
| Abstract: |
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. |
| Citation: |
Physica Scripta |
| Keywords: |
exciton;non-resonant x-ray raman scattering;reflection symmetry |
| Research Areas: |
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| PDF version: |
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