Eur. Phys. J. Appl. Phys.
Volume 87, Number 1, July 2019
|Number of page(s)||8|
|Section||Surfaces and Interfaces|
|Published online||29 August 2019|
Surface properties of rare-earth metals and the effects of their substitutional doping on work function of the W(110) surface
University of Science and Technology Liaoning, Anshan, Liaoning Province 114051, PR China
2 State Grid Yingkou Power Supply Company, Yingkou, Liaoning Province 115000, PR China
3 State Grid Anshan Electric Power Supply Company, AnShan, Liaoning Province 114000, PR China
* e-mail: email@example.com
Received in final form: 18 June 2019
Accepted: 22 July 2019
Published online: 29 August 2019
The surface energy and work function of rare-earth metals (from La to Lu) are studied by the first principles calculations. The obtained values are in good agreement with available experimental data. Motivated by enhanced thermionic emission performance resulting from low work function, we substitutionally doped the rare-earth atoms on W(110) surface to improve the work function. The results show that rare-earth atoms doping can significantly reduce the work function of the W(110) surface, and Eu, Pr and Nd are the three best candidates for work function reduction.
© EDP Sciences, 2019
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