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Directly photoexcited Dirac and Weyl fermions in ZrSiS and NbAs
https://oist.repo.nii.ac.jp/records/1303
https://oist.repo.nii.ac.jp/records/1303058a3644-29be-4195-a5f6-76c7cde71543
名前 / ファイル | ライセンス | アクション |
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Weber-2018-Directly photoexcited Dirac and Wey (1.0 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2020-03-17 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Directly photoexcited Dirac and Weyl fermions in ZrSiS and NbAs | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者(英) |
Weber, Chris P.
× Weber, Chris P.× Schoop, Leslie M.× Parkin, Stuart S. P.× Newby, Robert C.× Nateprov, Alex× Lotsch, Bettina× Mariserla, Bala Murali Krishna× Kim, J. Matthew× Dani, Keshav M.× Bechtel, Hans A.× Arushanov, Ernest× Ali, Mazhar |
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書誌情報 |
en : Applied Physics Letters 巻 113, 号 22, p. 221906, 発行日 2018-11-28 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | We report ultrafast optical measurements of the Dirac line-node semimetal ZrSiS and the Weyl semimetal NbAs, using mid-infrared pump photons from 86 meV to 500 meV to directly excite Dirac and Weyl fermions within the linearly dispersing bands. In NbAs, the photoexcited Weyl fermions initially form a non-thermal distribution, signified by a brief spike in the differential reflectivity whose sign is controlled by the relative energy of the pump and probe photons. In ZrSiS, electron-electron scattering rapidly thermalizes the electrons, and the spike is not observed. Subsequently, hot carriers in both materials cool within a few picoseconds. This cooling, as seen in the two materials' differential reflectivity, differs in sign, shape, and timescale. Nonetheless, we find that it may be described in a simple model of thermal electrons, without free parameters. The electronic cooling in ZrSiS is particularly fast, which may make the material useful for optoelectronic applications. | |||||
出版者 | ||||||
出版者 | AIP Publishing | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0003-6951 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1077-3118 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1063/1.5055207 | |||||
権利 | ||||||
権利情報 | © 2018 Author(s) | |||||
権利 | ||||||
権利情報 | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 113, 221906 (2018) and may be found at https://doi.org/10.1063/1.5055207. | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://aip.scitation.org/doi/10.1063/1.5055207 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |