Abnormal planar Hall effect and disentanglement of incoherent and coherent transport in a Kondo lattice
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arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
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2024
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| _version_ | 1866910946578923520 |
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| author | Zou, Shuo Zeng, Hai Wang, Zhuo Dong, Guohao Guo, Xiaodong Lu, Fangjun Zhu, Zengwei Shi, Youguo Yang, Yifeng Luo, Yongkang |
| author_facet | Zou, Shuo Zeng, Hai Wang, Zhuo Dong, Guohao Guo, Xiaodong Lu, Fangjun Zhu, Zengwei Shi, Youguo Yang, Yifeng Luo, Yongkang |
| contents | The nature of localized-itinerant transition in Kondo lattice systems remains a mystery despite intensive investigations in past decades. While it is often identified from the coherent peak in magnetic resistivity, recent angle-resolved photoemission spectroscopy and ultrafast optical spectroscopy revealed a precursor incoherent region with band bending and hybridization fluctuations. This raises the question of how the coherent heavy-electron state is developed from an incoherent background of fluctuating localized moments and then established at sufficiently low temperatures. Here, on the example of the quasi-one-dimensional Kondo lattice compound CeCo$_2$Ga$_8$, we show that planar Hall effect and planar anisotropic magnetoresistance measurements provide an effective way to disentangle the incoherent Kondo scattering contribution and the coherent heavy-electron contribution, and a multi-stage process is directly visualized with lowering temperature by their distinct angle-dependent patterns in magneto-transport. Our idea may be extended to other measurements and thereby opens up a pathway for systematically investigating the fundamental physics of Kondo lattice coherence. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_09908 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Abnormal planar Hall effect and disentanglement of incoherent and coherent transport in a Kondo lattice Zou, Shuo Zeng, Hai Wang, Zhuo Dong, Guohao Guo, Xiaodong Lu, Fangjun Zhu, Zengwei Shi, Youguo Yang, Yifeng Luo, Yongkang Strongly Correlated Electrons Materials Science Other Condensed Matter Superconductivity The nature of localized-itinerant transition in Kondo lattice systems remains a mystery despite intensive investigations in past decades. While it is often identified from the coherent peak in magnetic resistivity, recent angle-resolved photoemission spectroscopy and ultrafast optical spectroscopy revealed a precursor incoherent region with band bending and hybridization fluctuations. This raises the question of how the coherent heavy-electron state is developed from an incoherent background of fluctuating localized moments and then established at sufficiently low temperatures. Here, on the example of the quasi-one-dimensional Kondo lattice compound CeCo$_2$Ga$_8$, we show that planar Hall effect and planar anisotropic magnetoresistance measurements provide an effective way to disentangle the incoherent Kondo scattering contribution and the coherent heavy-electron contribution, and a multi-stage process is directly visualized with lowering temperature by their distinct angle-dependent patterns in magneto-transport. Our idea may be extended to other measurements and thereby opens up a pathway for systematically investigating the fundamental physics of Kondo lattice coherence. |
| title | Abnormal planar Hall effect and disentanglement of incoherent and coherent transport in a Kondo lattice |
| topic | Strongly Correlated Electrons Materials Science Other Condensed Matter Superconductivity |
| url | https://arxiv.org/abs/2407.09908 |