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Liu X, Lu D, Hou Z, Nagata K, Da B, Yoshikawa H, Tanuma S, Sun Y, Ding Z. Establishment and validation of an electron inelastic mean free path database for narrow bandgap inorganic compounds with a machine learning approach. Phys Chem Chem Phys 2023. [PMID: 37376953 DOI: 10.1039/d2cp04393a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Narrow bandgap inorganic compounds are extremely important in many areas of physics. However, their basic parameter database for surface analysis is incomplete. Electron inelastic mean free paths (IMFPs) are important parameters in surface analysis methods, such as electron spectroscopy and electron microscopy. Our previous research has presented a machine learning (ML) method to describe and predict IMFPs from calculated IMFPs for 41 elemental solids. This paper extends the use of the same machine learning method to 42 inorganic compounds based on the experience in predicting elemental electron IMFPs. The in-depth discussion extends to including material dependence discussion and parameter value selections. After robust validation of the ML method, we have produced an extensive IMFP database for 12 039 narrow bandgap inorganic compounds. Our findings suggest that ML is very efficient and powerful for IMFP description and database completion for various materials and has many advantages, including stability and convenience, over traditional methods.
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Affiliation(s)
- Xun Liu
- Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
| | - Dabao Lu
- Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
| | - Zhufeng Hou
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Kenji Nagata
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
| | - Bo Da
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
| | - Hideki Yoshikawa
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
| | - Shigeo Tanuma
- Research Network and Facility Services Division, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
| | - Yang Sun
- Department of Physics, Xiamen University, Xiamen, Fujian 361-005, China
| | - Zejun Ding
- Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
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