Metallic Conduction and Carrier Localization in Two-Dimensional BEDO-TTF Charge-Transfer Solid Crystals
Charge-transfer salts based on bis(ethylenedioxy)tetrathiafulvalene (BEDO-TTF or BO for short) provide a stable two-dimensional (2D) metallic state, while the electrical resistance often shows an upturn at low temperatures below ~10 K. Such 2D weak carrier localization was first recognized for BO sa...
| Main Authors: | , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-12-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/12/1/23 |
| _version_ | 1797494915730505728 |
|---|---|
| author | Hiroshi Ito Motoki Matsuno Seiu Katagiri Shinji K. Yoshina Taishi Takenobu Manabu Ishikawa Akihiro Otsuka Hideki Yamochi Yukihiro Yoshida Gunzi Saito Yongbing Shen Masahiro Yamashita |
| author_facet | Hiroshi Ito Motoki Matsuno Seiu Katagiri Shinji K. Yoshina Taishi Takenobu Manabu Ishikawa Akihiro Otsuka Hideki Yamochi Yukihiro Yoshida Gunzi Saito Yongbing Shen Masahiro Yamashita |
| author_sort | Hiroshi Ito |
| collection | DOAJ |
| description | Charge-transfer salts based on bis(ethylenedioxy)tetrathiafulvalene (BEDO-TTF or BO for short) provide a stable two-dimensional (2D) metallic state, while the electrical resistance often shows an upturn at low temperatures below ~10 K. Such 2D weak carrier localization was first recognized for BO salts in the Langmuir–Blodgett films fabricated with fatty acids; however, it has not been characterized in charge-transfer solid crystals. In this paper, we discuss the carrier localization of two crystalline BO charge-transfer salts with or without magnetic ions at low temperatures through the analysis of the weak negative magnetoresistance. The phase coherence lengths deduced with temperature dependence are largely dominated by the electron–electron scattering mechanism. These results indicate that the resistivity upturn at low temperatures is caused by the 2D weak localization. Disorders causing elastic scattering within the metallic domains, such as those of terminal ethylene groups, should be suppressed to prevent the localization. |
| first_indexed | 2024-03-10T01:41:06Z |
| format | Article |
| id | doaj.art-29ba541c690d47ff9c48f3ca1aa43cd3 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T01:41:06Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-29ba541c690d47ff9c48f3ca1aa43cd32023-11-23T13:23:58ZengMDPI AGCrystals2073-43522021-12-011212310.3390/cryst12010023Metallic Conduction and Carrier Localization in Two-Dimensional BEDO-TTF Charge-Transfer Solid CrystalsHiroshi Ito0Motoki Matsuno1Seiu Katagiri2Shinji K. Yoshina3Taishi Takenobu4Manabu Ishikawa5Akihiro Otsuka6Hideki Yamochi7Yukihiro Yoshida8Gunzi Saito9Yongbing Shen10Masahiro Yamashita11Department of Applied Physics, Nagoya University, Nagoya 464-8603, JapanDepartment of Applied Physics, Nagoya University, Nagoya 464-8603, JapanDepartment of Applied Physics, Nagoya University, Nagoya 464-8603, JapanDepartment of Applied Physics, Nagoya University, Nagoya 464-8603, JapanDepartment of Applied Physics, Nagoya University, Nagoya 464-8603, JapanDivision of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, JapanDivision of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, JapanDivision of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, JapanDivision of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, JapanFaculty of Agriculture, Meijo University, Nagoya 468-8502, JapanDepartment of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, JapanDepartment of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, JapanCharge-transfer salts based on bis(ethylenedioxy)tetrathiafulvalene (BEDO-TTF or BO for short) provide a stable two-dimensional (2D) metallic state, while the electrical resistance often shows an upturn at low temperatures below ~10 K. Such 2D weak carrier localization was first recognized for BO salts in the Langmuir–Blodgett films fabricated with fatty acids; however, it has not been characterized in charge-transfer solid crystals. In this paper, we discuss the carrier localization of two crystalline BO charge-transfer salts with or without magnetic ions at low temperatures through the analysis of the weak negative magnetoresistance. The phase coherence lengths deduced with temperature dependence are largely dominated by the electron–electron scattering mechanism. These results indicate that the resistivity upturn at low temperatures is caused by the 2D weak localization. Disorders causing elastic scattering within the metallic domains, such as those of terminal ethylene groups, should be suppressed to prevent the localization.https://www.mdpi.com/2073-4352/12/1/23charge-transfer solid crystalstwo-dimensional metalcarrier localizationnegative magnetoresistancephase coherence length |
| spellingShingle | Hiroshi Ito Motoki Matsuno Seiu Katagiri Shinji K. Yoshina Taishi Takenobu Manabu Ishikawa Akihiro Otsuka Hideki Yamochi Yukihiro Yoshida Gunzi Saito Yongbing Shen Masahiro Yamashita Metallic Conduction and Carrier Localization in Two-Dimensional BEDO-TTF Charge-Transfer Solid Crystals Crystals charge-transfer solid crystals two-dimensional metal carrier localization negative magnetoresistance phase coherence length |
| title | Metallic Conduction and Carrier Localization in Two-Dimensional BEDO-TTF Charge-Transfer Solid Crystals |
| title_full | Metallic Conduction and Carrier Localization in Two-Dimensional BEDO-TTF Charge-Transfer Solid Crystals |
| title_fullStr | Metallic Conduction and Carrier Localization in Two-Dimensional BEDO-TTF Charge-Transfer Solid Crystals |
| title_full_unstemmed | Metallic Conduction and Carrier Localization in Two-Dimensional BEDO-TTF Charge-Transfer Solid Crystals |
| title_short | Metallic Conduction and Carrier Localization in Two-Dimensional BEDO-TTF Charge-Transfer Solid Crystals |
| title_sort | metallic conduction and carrier localization in two dimensional bedo ttf charge transfer solid crystals |
| topic | charge-transfer solid crystals two-dimensional metal carrier localization negative magnetoresistance phase coherence length |
| url | https://www.mdpi.com/2073-4352/12/1/23 |
| work_keys_str_mv | AT hiroshiito metallicconductionandcarrierlocalizationintwodimensionalbedottfchargetransfersolidcrystals AT motokimatsuno metallicconductionandcarrierlocalizationintwodimensionalbedottfchargetransfersolidcrystals AT seiukatagiri metallicconductionandcarrierlocalizationintwodimensionalbedottfchargetransfersolidcrystals AT shinjikyoshina metallicconductionandcarrierlocalizationintwodimensionalbedottfchargetransfersolidcrystals AT taishitakenobu metallicconductionandcarrierlocalizationintwodimensionalbedottfchargetransfersolidcrystals AT manabuishikawa metallicconductionandcarrierlocalizationintwodimensionalbedottfchargetransfersolidcrystals AT akihirootsuka metallicconductionandcarrierlocalizationintwodimensionalbedottfchargetransfersolidcrystals AT hidekiyamochi metallicconductionandcarrierlocalizationintwodimensionalbedottfchargetransfersolidcrystals AT yukihiroyoshida metallicconductionandcarrierlocalizationintwodimensionalbedottfchargetransfersolidcrystals AT gunzisaito metallicconductionandcarrierlocalizationintwodimensionalbedottfchargetransfersolidcrystals AT yongbingshen metallicconductionandcarrierlocalizationintwodimensionalbedottfchargetransfersolidcrystals AT masahiroyamashita metallicconductionandcarrierlocalizationintwodimensionalbedottfchargetransfersolidcrystals |