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Low-Temperature Growth of Bismuth Thin Films with (111) Facet on Highly Oriented Pyrolytic Graphite
Song, F; Wells, JW; Jiang, Z; Saxegaard, M; Wahlstrom, E
2015
Source PublicationACS APPLIED MATERIALS & INTERFACES
Volume7Issue:16Pages:8525—8532
Subtype期刊文献
AbstractThe epitaxial growth of artificial two-dimensional metals at interfaces plays a key role,in fabricating heterostructures for nanoelectronics. Here, we present the growth of bismuth nanostructures on highly oriented pyrolytic graphite (HOPO) under ultrahigh vacuum (UHV) Conditions, which was investigated thoroughly by a combination of scanning tunneling microscopy (STM), ultraviolet photoemission spectroscopy (UPS), X-ray photoelectron spectroscopy (XPS), and low energy electron diffraction (TEED). It was found that (111)-oriented bilayers are formed on as-cleaved high-quality HOPG at 140 K, which opens the possibility of making Bi(111) thin films on a semimetal, and this is a notable step forward from the earlier studies, which show that only Bi(110) facets could be formed at ultrathin thickness at room temperature. XPS investigation of both C is and Bi 4f reflects the rather weak bonding between the Bi film and the HOPG substrate and suggests a quasi layer-by-layer growth mode of Bi nanostructures on HOPG at low temperature. Moreover, the evolution of the valence band of the interface is recorded by UPS, and a transition from quantum well states to bulk-like features is observed at varying film thickness. Unlike semimetallic bulk bismuth, ultrathin Bi(111) films are expected to be topological insulators. Our study may therefore pave the way for the generation of high quality Bi nanostructures to be used in spin electronics.
KeywordNanostructures Nanocrystals Transition Graphene Clusters Hopg
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24497
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Song, F,Wells, JW,Jiang, Z,et al. Low-Temperature Growth of Bismuth Thin Films with (111) Facet on Highly Oriented Pyrolytic Graphite[J]. ACS APPLIED MATERIALS & INTERFACES,2015,7(16):8525—8532.
APA Song, F,Wells, JW,Jiang, Z,Saxegaard, M,&Wahlstrom, E.(2015).Low-Temperature Growth of Bismuth Thin Films with (111) Facet on Highly Oriented Pyrolytic Graphite.ACS APPLIED MATERIALS & INTERFACES,7(16),8525—8532.
MLA Song, F,et al."Low-Temperature Growth of Bismuth Thin Films with (111) Facet on Highly Oriented Pyrolytic Graphite".ACS APPLIED MATERIALS & INTERFACES 7.16(2015):8525—8532.
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