Evidence of substrate metallization by Li adsorption on the Si(001) surface |
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| Affiliation: | 1. Department of Physics, University of Lakki Marwat, Lakki Marwat, 28420 KPK, Pakistan;2. College of Physics and Optoelectronics, Shenzhen University, Shenzhen, PR China;3. Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21099, Saudi Arabia;4. Department of Physics, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;5. Henan Key Laboratory of Electronic Ceramic Materials and Application, Henan University of Engineering, Zhengzhou 451191, PR China;6. Department of Physics, University of Buner, Buner 17290, Pakistan;7. Department of Mathematics, University of Lakki Marwat, Lakki Marwat, 28420 KPK, Pakistan;8. School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, PR China;9. Department of Physics, Riphah International University, 13 Raiwind Road, Lahore 54000, Pakistan;10. Department of Pediatrics, Yale School of Medicine yale University, New Haven, CT 0651, USA;11. Department of Physics, University of Poonch, Rawalakot, Pakistan;12. Department of Physics, Abdul Wali Khan University Mardan, 23200 KPK, Pakistan;1. Division of Applied Sciences, Muroran Institute of Technology, 27-1, Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan;2. Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, Inner Mongolia Normal University, Hohhot 010022, China;1. School of Earth and Environmental Sciences & Research Institute of Oceanography, Seoul National University, Seoul, Republic of Korea;2. Environmental Analysis Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea;3. School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea;4. School of Public Health, Seoul National University, Seoul, Republic of Korea;5. Department of Marine Biotechnology, Anyang University, Ganghwa, Incheon, Republic of Korea;6. Canadian Light Source, Saskatoon, SK, Canada;7. Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, SK, Canada;8. Department of Veterinary Biomedical Sciences & Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada;9. Department of Biology & Chemistry and State Key Laboratory in Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China;10. School of the Environment, Nanjing University, Nanjing, China |
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| Abstract: | We report an evidence of substrate metallization induced by Li adsorption on the Si(001) surface, based on the combined results of electron energy-loss (EEL) and angle-resolved photoemission (ARP) measurements. The metallic surface at a low dose of Li manifests itself as a loss peak due to an intraband surface plasmon in EEL spectra and a metallic peak in ARP spectra. These peaks are coherently understood in terms of substrate metallization, where electrons from Li adatoms partially occupy the empty substrate surface bands. Furthermore, the unique negative dispersion of the plasmon reveals that local field effects may cause such an anomalous dispersion. |
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