Charge carrier distribution in the region of charged domain walls in reduced lithium niobate
Charged domain walls (CDWs) in ferroelectric materials are of interest from both fundamental and applied perspectives due to their unique electrophysical properties, which differ significantly from those of the bulk material. Until recently, research efforts primarily focused on studying these prope...
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| Format: | Article |
| Language: | English |
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Pensoft Publishers
2024-12-01
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| Series: | Modern Electronic Materials |
| Online Access: | https://moem.pensoft.net/article/142174/download/pdf/ |
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| author | Aleksandr M. Kislyuk Mikhail D. Malinkovich Tatiana S. Ilina Ilya V. Kubasov Dmitry A. Kiselev Andrei V. Turutin Vladimir P. Ivanov Alexander A. Temirov Viktor V. Kuts Evelina E. Maksumova |
| author_facet | Aleksandr M. Kislyuk Mikhail D. Malinkovich Tatiana S. Ilina Ilya V. Kubasov Dmitry A. Kiselev Andrei V. Turutin Vladimir P. Ivanov Alexander A. Temirov Viktor V. Kuts Evelina E. Maksumova |
| author_sort | Aleksandr M. Kislyuk |
| collection | DOAJ |
| description | Charged domain walls (CDWs) in ferroelectric materials are of interest from both fundamental and applied perspectives due to their unique electrophysical properties, which differ significantly from those of the bulk material. Until recently, research efforts primarily focused on studying these properties, while less attention was given to the finite-thickness regions of CDWs with heterogeneous electrical conductivity. This study proposes a model describing the charge carrier distribution within the conductive region of CDWs. The dependencies of charge carrier concentration and mobility on the distance from the CDW were determined. An analytical expression for current-voltage characteristics, measurable by conductive atomic force microscopy (c-AFM), was also proposed. The model has been experimentally validated using AFM methods. In particular, the Debye screening length of the electric field of head-to-head (H–H) CDWs by free charge carriers in strongly reduced LiNbO3 crystals was found to be 90±10 nm. Additionally, the values of mobility and concentration of polarons forming the conductive H–H CDW were determined. The bound polaron concentration in this region is estimated to be approximately 30 times greater than in the monodomain region, reaching ≈3.8·1017 cm-3. |
| format | Article |
| id | doaj-art-1e6ee4a804034b54a1f59b66c34be2a7 |
| institution | Kabale University |
| issn | 2452-1779 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Pensoft Publishers |
| record_format | Article |
| series | Modern Electronic Materials |
| spelling | doaj-art-1e6ee4a804034b54a1f59b66c34be2a72025-02-12T08:31:48ZengPensoft PublishersModern Electronic Materials2452-17792024-12-0110421722610.3897/j.moem.10.4.142174142174Charge carrier distribution in the region of charged domain walls in reduced lithium niobateAleksandr M. Kislyuk0Mikhail D. Malinkovich1Tatiana S. Ilina2Ilya V. Kubasov3Dmitry A. Kiselev4Andrei V. Turutin5Vladimir P. Ivanov6Alexander A. Temirov7Viktor V. Kuts8Evelina E. Maksumova9National University of Science and Technology MISISNational University of Science and Technology MISISNational University of Science and Technology MISISNational University of Science and Technology MISISNational University of Science and Technology MISISNational University of Science and Technology MISISNational University of Science and Technology MISISNational University of Science and Technology MISISNational University of Science and Technology MISISNational University of Science and Technology MISISCharged domain walls (CDWs) in ferroelectric materials are of interest from both fundamental and applied perspectives due to their unique electrophysical properties, which differ significantly from those of the bulk material. Until recently, research efforts primarily focused on studying these properties, while less attention was given to the finite-thickness regions of CDWs with heterogeneous electrical conductivity. This study proposes a model describing the charge carrier distribution within the conductive region of CDWs. The dependencies of charge carrier concentration and mobility on the distance from the CDW were determined. An analytical expression for current-voltage characteristics, measurable by conductive atomic force microscopy (c-AFM), was also proposed. The model has been experimentally validated using AFM methods. In particular, the Debye screening length of the electric field of head-to-head (H–H) CDWs by free charge carriers in strongly reduced LiNbO3 crystals was found to be 90±10 nm. Additionally, the values of mobility and concentration of polarons forming the conductive H–H CDW were determined. The bound polaron concentration in this region is estimated to be approximately 30 times greater than in the monodomain region, reaching ≈3.8·1017 cm-3.https://moem.pensoft.net/article/142174/download/pdf/ |
| spellingShingle | Aleksandr M. Kislyuk Mikhail D. Malinkovich Tatiana S. Ilina Ilya V. Kubasov Dmitry A. Kiselev Andrei V. Turutin Vladimir P. Ivanov Alexander A. Temirov Viktor V. Kuts Evelina E. Maksumova Charge carrier distribution in the region of charged domain walls in reduced lithium niobate Modern Electronic Materials |
| title | Charge carrier distribution in the region of charged domain walls in reduced lithium niobate |
| title_full | Charge carrier distribution in the region of charged domain walls in reduced lithium niobate |
| title_fullStr | Charge carrier distribution in the region of charged domain walls in reduced lithium niobate |
| title_full_unstemmed | Charge carrier distribution in the region of charged domain walls in reduced lithium niobate |
| title_short | Charge carrier distribution in the region of charged domain walls in reduced lithium niobate |
| title_sort | charge carrier distribution in the region of charged domain walls in reduced lithium niobate |
| url | https://moem.pensoft.net/article/142174/download/pdf/ |
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