Interplay of negative electronic compressibility and capacitance enhancement in lightly-doped metal oxide Bi0.95La0.05FeO3 by quantum capacitance model
Abstract
Light-sensitive capacitance variation of Bi0.95La0.05FeO3 (BLFO) ceramics has been studied under violet to UV irradiation. The reversible capacitance enhancement up to 21% under 405 nm violet laser irradiation has been observed, suggesting a possible degree of freedom to dynamically control this in high dielectric materials for light-sensitive capacitance applications. By using ultraviolet photoemission spectroscopy (UPS), we show here that exposure of BLFO surfaces to UV light induces a counterintuitive shift of the O2p valence state to lower binding energy of up to 243 meV which is a direct signature of negative electronic compressibility (NEC). A decrease of BLFO electrical resistance agrees strongly with the UPS data suggesting the creation of a thin conductive layer on its insulating bulk under light irradiation. By exploiting the quantum capacitance model, we find that the negative quantum capacitance due to this NEC effect plays an important role in this capacitance enhancement.
- Authors:
-
- Suranaree Univ. of Technology, Nakhon Ratchasima (Thailand)
- Suranaree Univ. of Technology, Nakhon Ratchasima (Thailand); King Mongkut’s Univ. of Technology North Bangkok, Rayong (Thailand)
- Suranaree Univ. of Technology, Nakhon Ratchasima (Thailand); Thailand Center of Excellence in Physics (ThEP), Bangkok (Thailand)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Synchrotron Light Research Inst., Nakhon Ratchasima (Thailand)
- Suranaree Univ. of Technology, Nakhon Ratchasima (Thailand); Vidyasirimedhi Inst. of Science and Technology, Rayong (Thailand)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Sponsoring Org.:
- USDOE Office of Science (SC); Office of the Higher Education Commission
- OSTI Identifier:
- 1695721
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Ceramics; Electronic properties and materials; Ferroelectrics and multiferroics; Surfaces, interfaces and thin films
Citation Formats
Nathabumroong, S., Eknapakul, T., Jaiban, P., Yotburut, B., Siriroj, S., Saisopa, T., Mo, S.-K., Supruangnet, R., Nakajima, H., Yimnirun, R., Maensiri, S., and Meevasana, W.. Interplay of negative electronic compressibility and capacitance enhancement in lightly-doped metal oxide Bi0.95La0.05FeO3 by quantum capacitance model. United States: N. p., 2020.
Web. doi:10.1038/s41598-020-61859-6.
Nathabumroong, S., Eknapakul, T., Jaiban, P., Yotburut, B., Siriroj, S., Saisopa, T., Mo, S.-K., Supruangnet, R., Nakajima, H., Yimnirun, R., Maensiri, S., & Meevasana, W.. Interplay of negative electronic compressibility and capacitance enhancement in lightly-doped metal oxide Bi0.95La0.05FeO3 by quantum capacitance model. United States. https://doi.org/10.1038/s41598-020-61859-6
Nathabumroong, S., Eknapakul, T., Jaiban, P., Yotburut, B., Siriroj, S., Saisopa, T., Mo, S.-K., Supruangnet, R., Nakajima, H., Yimnirun, R., Maensiri, S., and Meevasana, W.. Fri .
"Interplay of negative electronic compressibility and capacitance enhancement in lightly-doped metal oxide Bi0.95La0.05FeO3 by quantum capacitance model". United States. https://doi.org/10.1038/s41598-020-61859-6. https://www.osti.gov/servlets/purl/1695721.
@article{osti_1695721,
title = {Interplay of negative electronic compressibility and capacitance enhancement in lightly-doped metal oxide Bi0.95La0.05FeO3 by quantum capacitance model},
author = {Nathabumroong, S. and Eknapakul, T. and Jaiban, P. and Yotburut, B. and Siriroj, S. and Saisopa, T. and Mo, S.-K. and Supruangnet, R. and Nakajima, H. and Yimnirun, R. and Maensiri, S. and Meevasana, W.},
abstractNote = {Light-sensitive capacitance variation of Bi0.95La0.05FeO3 (BLFO) ceramics has been studied under violet to UV irradiation. The reversible capacitance enhancement up to 21% under 405 nm violet laser irradiation has been observed, suggesting a possible degree of freedom to dynamically control this in high dielectric materials for light-sensitive capacitance applications. By using ultraviolet photoemission spectroscopy (UPS), we show here that exposure of BLFO surfaces to UV light induces a counterintuitive shift of the O2p valence state to lower binding energy of up to 243 meV which is a direct signature of negative electronic compressibility (NEC). A decrease of BLFO electrical resistance agrees strongly with the UPS data suggesting the creation of a thin conductive layer on its insulating bulk under light irradiation. By exploiting the quantum capacitance model, we find that the negative quantum capacitance due to this NEC effect plays an important role in this capacitance enhancement.},
doi = {10.1038/s41598-020-61859-6},
journal = {Scientific Reports},
number = 1,
volume = 10,
place = {United States},
year = {2020},
month = {3}
}
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