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강상관계 물질 연구단
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Effect of the sample work function on alkali metal dosing induced electronic structure change

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Title
Effect of the sample work function on alkali metal dosing induced electronic structure change
Author(s)
Saegyeol Jung; Yukiaki Ishida; Minsoo Kim; Nakajima, Masamichi; Ishida, Shigeyuki; Eisaki, Hiroshi; Choi, Woojae; Kwon, Yong Seung; Denlinger, Jonathan; Otsu, Toshio; Kobayashi, Yohei; 강상관계 물질 연구단; Kim, Chanyoung
Publication Date
2021-05
Journal
Journal of Electron Spectroscopy and Related Phenomena, v.249
Publisher
Elsevier B.V.
Abstract
© 2021 Elsevier B.V.Alkali metal dosing (AMD) has been widely used as a way to control doping without chemical substitution. This technique, in combination with angle resolved photoemission spectroscopy (ARPES), often provides an opportunity to observe unexpected phenomena. However, the amount of transferred charge and the corresponding change in the electronic structure vary significantly depending on the material. Here, we report study on the correlation between the sample work function and alkali metal induced electronic structure change for three iron-based superconductors: FeSe, Ba(Fe0.94Co0.06)2As2 and NaFeAs which share a similar Fermi surface topology. Electronic structure change upon monolayer of alkali metal dosing and the sample work function were measured by ARPES. Our results show that the degree of electronic structure change is proportional to the difference between the work function of the sample and Mulliken's absolute electronegativity of the dosed alkali metal. This finding provides a possible way to estimate the AMD induced electronic structure change.
URI
https://pr.ibs.re.kr/handle/8788114/9674
DOI
10.1016/j.elspec.2021.147045
ISSN
0368-2048
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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