2011/03/09 by J. D. Rameau, Jonathan Rameau, J. Smedley +7
Engineering · Materials Science · Physics and Astronomy · #Angle-resolved photoemission spectroscopy #Atomic physics #Condensed matter physics #Diamond #Diamond and Carbon-based Materials Research #Doping #Electron #Electronic structure #Hydrogen #Inverse photoemission spectroscopy #Materials science #Molecular Junctions and Nanostructures #Nuclear magnetic resonance #Optics #Optoelectronics #Photocathode #Photocathodes and Microchannel Plates #Photoemission spectroscopy #Physics #Synchrotron radiation #Vacuum level #X-ray photoelectron spectroscopy #cond-mat.other #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.106.137602
Accepted for publication in Physical Review Letters on Thursday Mar 03, 2011 4 pages, 4 figures, 22 references
arxiv created 2011/03/09 · openalex publication_date 2011/03/30 · arxiv updated 2015/05/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Electron emission from the negative electron affinity (NEA) surface of hydrogen terminated, boron doped diamond in the [100] orientation is investigated using angle resolved photoemission spectroscopy (ARPES). ARPES measurements using 16 eV synchrotron and 6 eV laser light are compared and found to show a catastrophic failure of the sudden approximation. While the high energy photoemission is found to yield little information regarding the NEA, low energy laser ARPES reveals for the first time that the NEA results from a novel Franck-Condon mechanism coupling electrons in the conduction band to the vacuum. The result opens the door to the development of a new class of NEA electron emitter based on this effect.