Surface core level shift on Be( 112̄0) |
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| Affiliation: | 1. School of Mechanical Engineering and Automation, Northeastern University of China, Shenyang, Liaoning 110004, China;2. School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China;3. Center for System Reliability and Safety, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China;4. Engineering Department, AVIC Chengdu Aircraft Industrial (Group) CO., LTD., Chengdu, Sichuan 610091, China |
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| Abstract: | A photoemission study of the Be(112̄0) surface carried out at a sample temperature of 100 K is reported. A surface shifted Be 1s component, having a shift of - 410 meV, is resolved on this surface. The extracted surface to bulk intensity ratio indicate that this component originates from atoms in the surface layer only. This is opposite to previous observations on both the close-packed Be(0001) surface and the Be(101̄0) surface where sub-surface shifted Be 1s levels were unambiguously identified. Among these three surfaces a surface layer atom is expected to have the lowest coordination on the (112̄0) surface but the surface layer shift is found to be smallest on this surface. Compared to findings on other metals this is unusual and reasons contributing to this behaviour are suggested and discussed. |
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