| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Large positive magnetoresistance in photocarrier-doped potassium tantalites |
| Rui-Shu Yang(杨睿姝), Ding-Bang Wang(王定邦), Yang Zhao(赵阳), Shuan-Hu Wang(王拴虎), and Ke-Xin Jin(金克新)† |
| Shaanxi Key Laboratory of Condensed Matter Structures and Properties and MOE Key Laboratory of Materials Physics and Chemistry under Extraordinary Conditions, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China |
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Abstract We report on the high-field magnetotransport of KTaO3 single crystals, which are a promising candidate for study in the extreme quantum limit. By photocarrier doping with 360 nm light, we observe a significant positive, non-saturating, and linear magnetoresistance at low temperatures accompanied by a decreasing Hall coefficient. When cooling down to 10 K, the magnetoresistance value of KTaO3 (100) reaches ～ 433% at a magnetic field of 12 T. Such behavior can be attributed to all the electrons occupying only the lowest Landau level in the extreme quantum limit. Light inhomogeneity may also contribute to large linear magnetoresistance. These results provide insights into novel magnetic devices based on complex materials and add a new family of materials with positive magnetoresistance.
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Received: 20 February 2022
Revised: 08 April 2022
Accepted manuscript online: 14 April 2022
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PACS:
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73.43.Qt
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(Magnetoresistance)
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73.50.Fq
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(High-field and nonlinear effects)
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73.40.Gk
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(Tunneling)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51572222), Key Research Project of the Natural Science Foundation of Shaanxi Province, China (Grant Nos. 2021JZ-08 and 2020JM-088), the Natural Science Basic Research Plan in Shaanxi Province of China (Grant No. 2021JM-041), and the Fundamental Research Funds for the Central Universities (Grant Nos. 3102017OQD074 and 310201911cx044). |
Corresponding Authors:
Ke-Xin Jin
E-mail: jinkx@nwpu.edu.cn
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Cite this article:
Rui-Shu Yang(杨睿姝), Ding-Bang Wang(王定邦), Yang Zhao(赵阳), Shuan-Hu Wang(王拴虎), and Ke-Xin Jin(金克新) Large positive magnetoresistance in photocarrier-doped potassium tantalites 2022 Chin. Phys. B 31 127302
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