JAIST Repository >
School of Materials Science >
Articles >
Journal Articles >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/10119/12325
|
Title: | Competing magnetism in π-electrons in graphene with a single carbon vacancy |
Authors: | Lee, Chi-Cheng Yamada-Takamura, Yukiko Ozaki, Taisuke |
Keywords: | graphene Kondo effect DFT magnetism |
Issue Date: | 2014-7-01 |
Publisher: | American Physical Society |
Magazine name: | Physical Review B |
Volume: | 90 |
Number: | 1 |
Start page: | 014401-1 |
End page: | 014401-5 |
DOI: | 10.1103/PhysRevB.90.014401 |
Abstract: | One intriguing finding in graphene is the vacancy-induced magnetism that highlights the interesting interaction between local magnetic moments and conduction electrons. Within density functional theory, the current understanding of the ground state is that a Stoner instability gives rise to ferromagnetism of π-electrons aligned with the localized moment of a σ dangling bond and the induced π magnetic moments vanish at low vacancy concentrations. However, the observed Kondo effect suggests that π-electrons around the vacancy should antiferromagnetically couple to the local moment and should carry nonvanishing moments. Here we propose that a phase possessing both significant out-of-plane displacements and π bands with antiferromagnetic coupling to the localized σ moment is the ground state. With the features we provide, it is possible for spin-resolved scanning tunneling microscopy, scanning tunneling spectroscopy, and angle-resolved photoelectron spectroscopy measurements to verify the proposed phase. |
Rights: | Chi-Cheng Lee, Yukiko Yamada-Takamura, and Taisuke Ozaki, Physical Review B, 90(1), 2014, 014401-1-014401-5. Copyright 2014 by the American Physical Society. http://dx.doi.org/10.1103/PhysRevB.90.014401 |
URI: | http://hdl.handle.net/10119/12325 |
Material Type: | publisher |
Appears in Collections: | c10-1. 雑誌掲載論文 (Journal Articles)
|
Files in This Item:
File |
Description |
Size | Format |
20946.pdf | | 1434Kb | Adobe PDF | View/Open |
|
All items in DSpace are protected by copyright, with all rights reserved.
|