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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2501.04215 |
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| _version_ | 1866912179800768512 |
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| author | Liu, Zenglin Shi, Jingwen Cao, Jin Ma, Zecheng Yang, Zaizheng Cui, Yanwei Wang, Lizheng Dai, Yudi Chen, Moyu Wang, Pengfei Xie, Yongqin Chen, Fanqiang Shi, Youguo Xiao, Cong Yang, Shengyuan A. Cheng, Bin Liang, Shi-Jun Miao, Feng |
| author_facet | Liu, Zenglin Shi, Jingwen Cao, Jin Ma, Zecheng Yang, Zaizheng Cui, Yanwei Wang, Lizheng Dai, Yudi Chen, Moyu Wang, Pengfei Xie, Yongqin Chen, Fanqiang Shi, Youguo Xiao, Cong Yang, Shengyuan A. Cheng, Bin Liang, Shi-Jun Miao, Feng |
| contents | Human skin provides crucial tactile feedback, allowing us to skillfully perceive various objects by sensing and encoding complex deformations through multiple parameters in each tactile receptor. However, replicating this high-dimensional tactile perception with conventional materials' electronic properties remains a daunting challenge. Here, we present a skin-inspired method to encode strain vectors directly within a sensor. This is achieved by leveraging the strain-tunable quantum properties of electronic bands in the van der Waals topological semimetal Td -WTe2. We observe robust and independent responses from the second-order and third-order nonlinear Hall signals in Td -WTe2 when subjected to variations in both the magnitude and direction of strain. Through rigorous temperature-dependent measurements and scaling law analysis, we establish that these strain responses primarily stem from quantum geometry-related phenomena, including the Berry curvature and Berry-connection polarizability tensor. Furthermore, our study demonstrates that the strain-dependent nonlinear Hall signals can efficiently encode high-dimensional strain information using a single device. This capability enables accurate and comprehensive sensing of complex strain patterns in the embossed character "NJU". Our findings highlight the promising application of topological quantum materials in advancing next-generation, bio-inspired flexible electronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_04215 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Skin-inspired in-sensor encoding of strain vector using tunable quantum geometry Liu, Zenglin Shi, Jingwen Cao, Jin Ma, Zecheng Yang, Zaizheng Cui, Yanwei Wang, Lizheng Dai, Yudi Chen, Moyu Wang, Pengfei Xie, Yongqin Chen, Fanqiang Shi, Youguo Xiao, Cong Yang, Shengyuan A. Cheng, Bin Liang, Shi-Jun Miao, Feng Mesoscale and Nanoscale Physics Human skin provides crucial tactile feedback, allowing us to skillfully perceive various objects by sensing and encoding complex deformations through multiple parameters in each tactile receptor. However, replicating this high-dimensional tactile perception with conventional materials' electronic properties remains a daunting challenge. Here, we present a skin-inspired method to encode strain vectors directly within a sensor. This is achieved by leveraging the strain-tunable quantum properties of electronic bands in the van der Waals topological semimetal Td -WTe2. We observe robust and independent responses from the second-order and third-order nonlinear Hall signals in Td -WTe2 when subjected to variations in both the magnitude and direction of strain. Through rigorous temperature-dependent measurements and scaling law analysis, we establish that these strain responses primarily stem from quantum geometry-related phenomena, including the Berry curvature and Berry-connection polarizability tensor. Furthermore, our study demonstrates that the strain-dependent nonlinear Hall signals can efficiently encode high-dimensional strain information using a single device. This capability enables accurate and comprehensive sensing of complex strain patterns in the embossed character "NJU". Our findings highlight the promising application of topological quantum materials in advancing next-generation, bio-inspired flexible electronics. |
| title | Skin-inspired in-sensor encoding of strain vector using tunable quantum geometry |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2501.04215 |