High Island Densities and Long Range Repulsive Interactions: Fe on Epitaxial Graphene
Abstract
The understanding of metal nucleation on graphene is essential for promising future applications, especially of magnetic metals which can be used in spintronics or computer storage media. A common method to study the grown morphology is to measure the nucleated island density n as a function of growth parameters. Surprisingly, the growth of Fe on graphene is found to be unusual because it does not follow classical nucleation: n is unexpectedtly high, it increases continuously with the deposited amount θ and shows no temperature dependence. These unusual results indicate the presence of long range repulsive interactions. Kinetic Monte Carlo simulations and density functional theory calculations support this conclusion. In addition to answering an outstanding question in epitaxial growth, i.e., to find systems where long range interactions are present, the high density of magnetic islands, tunable with θ, is of interest for nanomagnetism applications.
- Authors:
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1052093
- Report Number(s):
- IS-J 7766
Journal ID: 0031-9007
- DOE Contract Number:
- DE-AC02-07CH11358
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 109; Journal Issue: 2
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Binz, Steven M, Hupalo, Myron, Liu, Xiaojie, Wang, Cai-Zhuang, Lu, Wen-Cai, Thiel, Kai-Ming, Conrad, E H, and Tringides, Michael C. High Island Densities and Long Range Repulsive Interactions: Fe on Epitaxial Graphene. United States: N. p., 2012.
Web. doi:10.1103/PhysRevLett.109.026103.
Binz, Steven M, Hupalo, Myron, Liu, Xiaojie, Wang, Cai-Zhuang, Lu, Wen-Cai, Thiel, Kai-Ming, Conrad, E H, & Tringides, Michael C. High Island Densities and Long Range Repulsive Interactions: Fe on Epitaxial Graphene. United States. https://doi.org/10.1103/PhysRevLett.109.026103
Binz, Steven M, Hupalo, Myron, Liu, Xiaojie, Wang, Cai-Zhuang, Lu, Wen-Cai, Thiel, Kai-Ming, Conrad, E H, and Tringides, Michael C. 2012.
"High Island Densities and Long Range Repulsive Interactions: Fe on Epitaxial Graphene". United States. https://doi.org/10.1103/PhysRevLett.109.026103.
@article{osti_1052093,
title = {High Island Densities and Long Range Repulsive Interactions: Fe on Epitaxial Graphene},
author = {Binz, Steven M and Hupalo, Myron and Liu, Xiaojie and Wang, Cai-Zhuang and Lu, Wen-Cai and Thiel, Kai-Ming and Conrad, E H and Tringides, Michael C},
abstractNote = {The understanding of metal nucleation on graphene is essential for promising future applications, especially of magnetic metals which can be used in spintronics or computer storage media. A common method to study the grown morphology is to measure the nucleated island density n as a function of growth parameters. Surprisingly, the growth of Fe on graphene is found to be unusual because it does not follow classical nucleation: n is unexpectedtly high, it increases continuously with the deposited amount θ and shows no temperature dependence. These unusual results indicate the presence of long range repulsive interactions. Kinetic Monte Carlo simulations and density functional theory calculations support this conclusion. In addition to answering an outstanding question in epitaxial growth, i.e., to find systems where long range interactions are present, the high density of magnetic islands, tunable with θ, is of interest for nanomagnetism applications.},
doi = {10.1103/PhysRevLett.109.026103},
url = {https://www.osti.gov/biblio/1052093},
journal = {Physical Review Letters},
number = 2,
volume = 109,
place = {United States},
year = {Fri Jul 13 00:00:00 EDT 2012},
month = {Fri Jul 13 00:00:00 EDT 2012}
}