Ordinary and supernumerary resonant scattering of low energy electrons from the BiCu2(111) surface alloy
Electron intensity versus energy curves from the ordered substitutional BiCu _2 (111)-surface alloy, obtained with low energy electron microscopy (LEEM), show distinct unexpected intensity dips under normal incidence conditions. The dips above 10 eV are found to be characteristic of ordinary resonan...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2017-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aa55ab |
| _version_ | 1797750881696874496 |
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| author | Bene Poelsema Michael S Altman Raoul van Gastel Harold J W Zandvliet Arie van Houselt |
| author_facet | Bene Poelsema Michael S Altman Raoul van Gastel Harold J W Zandvliet Arie van Houselt |
| author_sort | Bene Poelsema |
| collection | DOAJ |
| description | Electron intensity versus energy curves from the ordered substitutional BiCu _2 (111)-surface alloy, obtained with low energy electron microscopy (LEEM), show distinct unexpected intensity dips under normal incidence conditions. The dips above 10 eV are found to be characteristic of ordinary resonant scattering of electrons. Their positions represent resonant scattering into image potential states, involving scattering along G _10 and G _11 reciprocal lattice vectors. A detailed analysis of additional specular intensity dips at energies below 10 eV demonstrates that these originate from supernumerary resonant scattering, now also along lower symmetry directions, that should be forbidden in this energy range for the perfect crystal. LEEM is highly sensitive to detect these often neglected features which, if not properly disentangled or discarded, hamper its potential to extract the rich information about atomic positions and unoccupied electronic states encoded in very low energy electron scattering. |
| first_indexed | 2024-03-12T16:39:15Z |
| format | Article |
| id | doaj.art-3142807084e8413583adc662d91d435a |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:39:15Z |
| publishDate | 2017-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-3142807084e8413583adc662d91d435a2023-08-08T14:35:03ZengIOP PublishingNew Journal of Physics1367-26302017-01-0119101302410.1088/1367-2630/aa55abOrdinary and supernumerary resonant scattering of low energy electrons from the BiCu2(111) surface alloyBene Poelsema0Michael S Altman1Raoul van Gastel2Harold J W Zandvliet3Arie van Houselt4Physics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente , PO Box 217, 7500 AE Enschede, The NetherlandsDepartment of Physics, Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, People’s Republic of ChinaPhysics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente , PO Box 217, 7500 AE Enschede, The NetherlandsPhysics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente , PO Box 217, 7500 AE Enschede, The NetherlandsPhysics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente , PO Box 217, 7500 AE Enschede, The NetherlandsElectron intensity versus energy curves from the ordered substitutional BiCu _2 (111)-surface alloy, obtained with low energy electron microscopy (LEEM), show distinct unexpected intensity dips under normal incidence conditions. The dips above 10 eV are found to be characteristic of ordinary resonant scattering of electrons. Their positions represent resonant scattering into image potential states, involving scattering along G _10 and G _11 reciprocal lattice vectors. A detailed analysis of additional specular intensity dips at energies below 10 eV demonstrates that these originate from supernumerary resonant scattering, now also along lower symmetry directions, that should be forbidden in this energy range for the perfect crystal. LEEM is highly sensitive to detect these often neglected features which, if not properly disentangled or discarded, hamper its potential to extract the rich information about atomic positions and unoccupied electronic states encoded in very low energy electron scattering.https://doi.org/10.1088/1367-2630/aa55abresonant scatteringLEEMVLEED |
| spellingShingle | Bene Poelsema Michael S Altman Raoul van Gastel Harold J W Zandvliet Arie van Houselt Ordinary and supernumerary resonant scattering of low energy electrons from the BiCu2(111) surface alloy New Journal of Physics resonant scattering LEEM VLEED |
| title | Ordinary and supernumerary resonant scattering of low energy electrons from the BiCu2(111) surface alloy |
| title_full | Ordinary and supernumerary resonant scattering of low energy electrons from the BiCu2(111) surface alloy |
| title_fullStr | Ordinary and supernumerary resonant scattering of low energy electrons from the BiCu2(111) surface alloy |
| title_full_unstemmed | Ordinary and supernumerary resonant scattering of low energy electrons from the BiCu2(111) surface alloy |
| title_short | Ordinary and supernumerary resonant scattering of low energy electrons from the BiCu2(111) surface alloy |
| title_sort | ordinary and supernumerary resonant scattering of low energy electrons from the bicu2 111 surface alloy |
| topic | resonant scattering LEEM VLEED |
| url | https://doi.org/10.1088/1367-2630/aa55ab |
| work_keys_str_mv | AT benepoelsema ordinaryandsupernumeraryresonantscatteringoflowenergyelectronsfromthebicu2111surfacealloy AT michaelsaltman ordinaryandsupernumeraryresonantscatteringoflowenergyelectronsfromthebicu2111surfacealloy AT raoulvangastel ordinaryandsupernumeraryresonantscatteringoflowenergyelectronsfromthebicu2111surfacealloy AT haroldjwzandvliet ordinaryandsupernumeraryresonantscatteringoflowenergyelectronsfromthebicu2111surfacealloy AT arievanhouselt ordinaryandsupernumeraryresonantscatteringoflowenergyelectronsfromthebicu2111surfacealloy |