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Interaction between alkali metals and diamond: Etching and charge states of NV centers

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Title: Interaction between alkali metals and diamond: Etching and charge states of NV centers
Authors: Takehana, Hiroki Browse this author
Yamane, Ichiro Browse this author
Yanase, Takashi Browse this author
Nagahama, Taro Browse this author →KAKEN DB
Shimada, Toshihiro Browse this author →KAKEN DB
Keywords: Diamond
Alkali metals
NV center
Band bending
Issue Date: Sep-2021
Publisher: Elsevier
Journal Title: Carbon
Volume: 182
Start Page: 585
End Page: 592
Publisher DOI: 10.1016/j.carbon.2021.06.059
Abstract: Single crystal diamond particles were heated with liquid phase alkali metals (Li, Na, K) in an argon atmosphere. It was found that Li reacts with the diamond above 600 degrees C, Na makes the surface rougher on a nm scale at 800 degrees C, and K did not change the surface morphology. The etching speed by the reaction with Li is the fastest on the (001) surface. Photoluminescence of the NV- (negatively charged nitrogen vacancy) center decreased only after the annealing with K. DFT calculations explained the strong chemical interaction between Li and the diamond (001) surfaces, and upward band bending at the interfaces with Na and K. The behavior of the NV-center photoluminescence is consistent with the extent of band bending. (C) 2021 Elsevier Ltd. All rights reserved.
Rights: ©2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 島田 敏宏

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