Interplay between quantum confinement and surface effects in thickness selective stability of thin Ag and Eu films

被引：3
|
作者：
Liu, Xiaojie [1 ]
Wang, Cai-Zhuang [2 ,3 ]
机构：
[1] Northeast Normal Univ, Ctr Quantum Sci & Sch Phys, Changchun 130117, Peoples R China
[2] Iowa State Univ, Ames Lab, US Dept Energy, Ames, IA 50011 USA
[3] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2017年 / 29卷 / 18期
基金：
中国国家自然科学基金;
关键词：
surface states; quantum well states; thickness selective stability; first-principles calculation; TOTAL-ENERGY CALCULATIONS; GROWTH-MORPHOLOGY; METAL-FILMS; STATES;
D O I：
10.1088/1361-648X/aa6556
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Using first-principles calculations, we show that both face-centered cubic (fcc) Ag (1 1 0) ultrathin films and body-centered cubic (bcc) Eu(1 1 0) ultrathin films exhibit thickness selective stability. However, the origin of such thickness selection is different. While the thickness selective stability in fcc Ag(1 1 0) films is mainly due to the well-known quantum well states ascribed to the quantum confinement effects in free-electron-like metal films, the thickness selection in bcc Eu(1 1 0) films is more complex and also strongly correlated with the occupation of the surface and surface resonance states.
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页数：7
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