dd excitations in three-dimensional q-space: a nonresonant inelastic X-ray scattering study on NiO
We have studied the dd excitations in NiO over three-dimensional momentum ( q ) space using nonresonant inelastic X-ray scattering. In addition to the previously reported peaks at 1.7 and 3.0 eV, another peak is found at 1.0 eV, with a dramatically different intensity distribution in momentum space....
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
17 October 2011
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| In: |
epl
Year: 2011, Volume: 96, Issue: 3 |
| ISSN: | 1286-4854 |
| DOI: | 10.1209/0295-5075/96/37007 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1209/0295-5075/96/37007 Verlag, Volltext: http://stacks.iop.org/0295-5075/96/i=3/a=37007 
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| Author Notes: | N. Hiraoka, M. Suzuki, K.D. Tsuei, H. Ishii, Y.Q. Cai, M.W. Haverkort, C.C. Lee and W. Ku |
| Summary: | We have studied the dd excitations in NiO over three-dimensional momentum ( q ) space using nonresonant inelastic X-ray scattering. In addition to the previously reported peaks at 1.7 and 3.0 eV, another peak is found at 1.0 eV, with a dramatically different intensity distribution in momentum space.Contrary to the other two peaks that form oval structures maximizing at [111] directions, the 1.0 eV peak displays appreciable intensity along low-symmetry axes near [311] and [210], but vanishes in the three principal axes [100], [110], and [111], indicating a significant difference in the exciton wave function.We find good agreement between the experimental data and two state-of-the-art theories, advocating investigating other strongly correlated materials with similar experimental/theoretical approaches. |
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| Item Description: | Gesehen am 07.11.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1286-4854 |
| DOI: | 10.1209/0295-5075/96/37007 |