Electric potential of the surface region of an insulating sample, caused by irradiation.
Notes: - Different charging potentials can occur on different areas or at different depths in a sample, arising from sample inhomogeneities or non-uniform intensity of the incident flux of radiation.
- The surface and bulk potentials can differ, for example as a result of band bending, interface dipoles, and charge centres.
Source:
PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1800 (https://doi.org/10.1515/pac-2019-0404)