Effects of disorder on the quantum transport properties in topologically nontrivial metal PbTaSe$_{2}$
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866913644013420544 |
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| author | Sun, Longfei Sun, Yue Hou, Qiang Sankar, R. Kalaivanan, R. Xu, Xiaofeng Shi, Zhixiang Tamegai, Tsuyoshi |
| author_facet | Sun, Longfei Sun, Yue Hou, Qiang Sankar, R. Kalaivanan, R. Xu, Xiaofeng Shi, Zhixiang Tamegai, Tsuyoshi |
| contents | Weak antilocalization (WAL), an increase in the electrical conductivity at low temperatures associated with the suppression of electron localization due to quantum interference effects, is often observed in topological materials. In this study, we report the observation of WAL in topologically nontrivial metal PbTaSe$_{2}$ at low temperatures. In the pristine sample, we identified the presence of WAL, which is attributed to the topologically protected backscattering. In order to investigate the influence of disorder on the WAL, we successively introduced controlled amounts of disorder by H$^{+}$-irradiation. As disorder increases, the dip-like magnetoresistance caused by WAL changes to a linear magnetoresistance(MR), and eventually to a quadratic MR as the electronic system becomes highly localized. This research unveils the significance of disorder in shaping the quantum transport characteristics of topological materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_06272 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Effects of disorder on the quantum transport properties in topologically nontrivial metal PbTaSe$_{2}$ Sun, Longfei Sun, Yue Hou, Qiang Sankar, R. Kalaivanan, R. Xu, Xiaofeng Shi, Zhixiang Tamegai, Tsuyoshi Mesoscale and Nanoscale Physics Strongly Correlated Electrons Superconductivity Weak antilocalization (WAL), an increase in the electrical conductivity at low temperatures associated with the suppression of electron localization due to quantum interference effects, is often observed in topological materials. In this study, we report the observation of WAL in topologically nontrivial metal PbTaSe$_{2}$ at low temperatures. In the pristine sample, we identified the presence of WAL, which is attributed to the topologically protected backscattering. In order to investigate the influence of disorder on the WAL, we successively introduced controlled amounts of disorder by H$^{+}$-irradiation. As disorder increases, the dip-like magnetoresistance caused by WAL changes to a linear magnetoresistance(MR), and eventually to a quadratic MR as the electronic system becomes highly localized. This research unveils the significance of disorder in shaping the quantum transport characteristics of topological materials. |
| title | Effects of disorder on the quantum transport properties in topologically nontrivial metal PbTaSe$_{2}$ |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2501.06272 |