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Zero-bias anomaly and role of electronic correlations in a disordered metal film

Title
Zero-bias anomaly and role of electronic correlations in a disordered metal film
Authors
Jeon, SangjunKim, SungminKuk, Young
DGIST Authors
Jeon, Sangjun; Kim, Sungmin; Kuk, Young
Issue Date
2020-08
Citation
New Journal of Physics, 22(8), 083045
Type
Article
Article Type
Article
Author Keywords
zero bias anomalydynamic Coulomb blockadedisorderlocalizationelectron correlation
Keywords
DENSITY-OF-STATESCONDUCTIONSPECTROSCOPYDIFFUSIONABSENCE
ISSN
1367-2630
Abstract
Localization and electron correlation play significant roles in understanding the electronic states of low-dimensional systems. We carried out the tunneling spectroscopy measurements on a crystalline nano-sized island and a disordered two-dimensional metal film. The low temperature zero-bias anomaly was studied using theory and statistical analysis of the spatial distribution of the local density of states in both the systems. The effective capacitance and resistance of the tunnel junction extracted from theory gives the energy and temperature dependency of the measured ZBA. Statistical analysis reveals the electron correlation effect and the electron correlation length. By combining theory and the statistical analysis, we found that the microscopic origin of ZBA formation in the disordered two-dimensional film is strongly related to the electron localization and the correlations. © 2020 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
URI
http://hdl.handle.net/20.500.11750/12800
DOI
10.1088/1367-2630/aba3e7
Publisher
IOP Publishing Ltd
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