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Atomistic insights into the growth of Bi (110) thin films on Cu (111) substrate
- Source :
- Applied Surface Science. 481:1449-1458
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Using first-principles calculations, we study the growth process of bismuth (Bi) films on Cu (111) substrate. By analyzing the formation mechanism of single layer α‑bismuthene and stability of multilayered Bi layers, we reveal that Bi atoms show quasi-one-dimensional growth model by developing periodic zigzag chains, and eventually form a Bi atomic layer on Cu (111) surface. Flat surface α‑bismuthene (Fα-Bi) can be formed by depositing two Bi atomic layers on Cu (111) and maintains its stability below 60 K. In the multilayered Bi atomic layers, the stability of Bi films shows an oscillatory behavior. It is more stable for Bi films with even layers. The charge density between even and odd films shows that the stability is associated with the saturation of pz orbital of Bi atoms. Besides, the distorted surface α‑bismuthene (Dα-Bi) can maintain its stability up to 450 K on Cu (111) surface. Further study shows that the Cu substrate strongly affects the properties of Fα-Bi than that of Dα-Bi. Our studies provide guidance for fabricating stable Bi (110) thin films based devices.
- Subjects :
- Materials science
General Physics and Astronomy
Charge density
chemistry.chemical_element
02 engineering and technology
Surfaces and Interfaces
General Chemistry
Growth model
Substrate (electronics)
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Surfaces, Coatings and Films
Bismuth
chemistry
Zigzag
Chemical physics
Thin film
0210 nano-technology
Saturation (magnetic)
Layer (electronics)
Subjects
Details
- ISSN :
- 01694332
- Volume :
- 481
- Database :
- OpenAIRE
- Journal :
- Applied Surface Science
- Accession number :
- edsair.doi...........a0e0f02156b83872f2320b33c37d1388