Low-symmetry nonlocal transport in microstructured squares of delafossite metals

McGuinness, Philippa H.; Zhakina, Elina; Koenig, Markus; Bachmann, Maja D.; Putzke, Carsten; Moll, Philip J. W.; Khim, Seunghyun; Mackenzie, Andrew P.

doi:10.1073/pnas.2113185118

Low-symmetry nonlocal transport in microstructured squares of delafossite metals

McGuinness, P. H., Zhakina, E., Koenig, M., Bachmann, M. D., Putzke, C., Moll, P. J. W., Khim, S., & Mackenzie, A. P. (2021). Low-symmetry nonlocal transport in microstructured squares of delafossite metals. Proceedings of the National Academy of Sciences of the United States of America, 118(47):. doi:10.1073/pnas.2113185118.

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アイテムのパーマリンク: https://hdl.handle.net/21.11116/0000-000B-75C8-0 版のパーマリンク: https://hdl.handle.net/21.11116/0000-000B-75C9-F

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McGuinness, Philippa H.¹, 著者
Zhakina, Elina¹, 著者
Koenig, Markus¹, 著者
Bachmann, Maja D.¹, 著者
Putzke, Carsten¹, 著者
Moll, Philip J. W.¹, 著者
Khim, Seunghyun¹, 著者
Mackenzie, Andrew P.¹, 著者

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要旨: Intense work studying the ballistic regime of electron transport in two-dimensional systems based on semiconductors and graphene had been thought to have established most of the key experimental facts of the field. In recent years, however, additional forms of ballistic transport have become accessible in the quasi–two-dimensional delafossite metals, whose Fermi wavelength is a factor of 100 shorter than those typically studied in the previous work and whose Fermi surfaces are nearly hexagonal in shape and therefore strongly faceted. This has some profound consequences for results obtained from the classic ballistic transport experiment of studying bend and Hall resistances in mesoscopic squares fabricated from delafossite single crystals. We observe pronounced anisotropies in bend resistances and even a Hall voltage that is strongly asymmetric in magnetic field. Although some of our observations are nonintuitive at first sight, we show that they can be understood within a nonlocal Landauer-Büttiker analysis tailored to the symmetries of the square/hexagonal geometries of our combined device/Fermi surface system. Signatures of nonlocal transport can be resolved for squares of linear dimension of nearly 100 µm, approximately a factor of 15 larger than the bulk mean free path of the crystal from which the device was fabricated.

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言語: eng - English

日付: オンライン出版: 2021

出版の状態: オンラインで出版済み

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識別子（DOI, ISBNなど）: DOI: 10.1073/pnas.2113185118

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出版物名: Proceedings of the National Academy of Sciences of the United States of America

その他 : PNAS

その他 : Proceedings of the National Academy of Sciences of the USA

省略形 : Proc. Natl. Acad. Sci. U. S. A.

種別: 学術雑誌

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出版社, 出版地: Washington, D.C. : National Academy of Sciences

ページ: - 巻号: 118 (47) 通巻号: e2113185118 開始・終了ページ: - 識別子（ISBN, ISSN, DOIなど）: ISSN: 0027-8424
CoNE: https://pure.mpg.de/cone/journals/resource/954925427230

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