Conductance Quantization at Zero Magnetic Field in InSb Nanowires

Jakob Kammhuber; Maja C. Cassidy; H. Zhang; Önder Gül; F. Pei; Michiel W.A. De Moor; Bas Nijholt; Kenji Watanabe; Takashi Taniguchi; Diana Car; Sébastien R. Plissard; Erik P.A.M. Bakkers; Leo P. Kouwenhoven

doi:10.1021/acs.nanolett.6b00051

Conductance Quantization at Zero Magnetic Field in InSb Nanowires

Jakob Kammhuber, Maja C. Cassidy, H. Zhang, Önder Gül, F. Pei, Michiel W.A. De Moor, Bas Nijholt, Kenji Watanabe, Takashi Taniguchi, Diana Car, Sébastien R. Plissard, Erik P.A.M. Bakkers, Leo P. Kouwenhoven^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

85 Citations (Scopus)

Abstract

Ballistic electron transport is a key requirement for existence of a topological phase transition in proximitized InSb nanowires. However, measurements of quantized conductance as direct evidence of ballistic transport have so far been obscured due to the increased chance of backscattering in one-dimensional nanowires. We show that by improving the nanowire-metal interface as well as the dielectric environment we can consistently achieve conductance quantization at zero magnetic field. Additionally we study the contribution of orbital effects to the sub-band dispersion for different orientation of the magnetic field, observing a near-degeneracy between the second and third sub-bands.

Original language	English
Pages (from-to)	3482-3486
Number of pages	5
Journal	Nano Letters: a journal dedicated to nanoscience and nanotechnology
Volume	16
Issue number	6
DOIs	https://doi.org/10.1021/acs.nanolett.6b00051
Publication status	Published - 8 Jun 2016

Keywords

conductance quantization
InSb
nanowire
orbital effects
Quantum point contact
subband

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10.1021/acs.nanolett.6b00051

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Kammhuber, J., Cassidy, M. C., Zhang, H., Gül, Ö., Pei, F., De Moor, M. W. A., Nijholt, B., Watanabe, K., Taniguchi, T., Car, D., Plissard, S. R., Bakkers, E. P. A. M., & Kouwenhoven, L. P. (2016). Conductance Quantization at Zero Magnetic Field in InSb Nanowires. Nano Letters: a journal dedicated to nanoscience and nanotechnology, 16(6), 3482-3486. https://doi.org/10.1021/acs.nanolett.6b00051

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title = "Conductance Quantization at Zero Magnetic Field in InSb Nanowires",

abstract = "Ballistic electron transport is a key requirement for existence of a topological phase transition in proximitized InSb nanowires. However, measurements of quantized conductance as direct evidence of ballistic transport have so far been obscured due to the increased chance of backscattering in one-dimensional nanowires. We show that by improving the nanowire-metal interface as well as the dielectric environment we can consistently achieve conductance quantization at zero magnetic field. Additionally we study the contribution of orbital effects to the sub-band dispersion for different orientation of the magnetic field, observing a near-degeneracy between the second and third sub-bands.",

keywords = "conductance quantization, InSb, nanowire, orbital effects, Quantum point contact, subband",

author = "Jakob Kammhuber and Cassidy, {Maja C.} and H. Zhang and {\"O}nder G{\"u}l and F. Pei and {De Moor}, {Michiel W.A.} and Bas Nijholt and Kenji Watanabe and Takashi Taniguchi and Diana Car and Plissard, {S{\'e}bastien R.} and Bakkers, {Erik P.A.M.} and Kouwenhoven, {Leo P.}",

year = "2016",

month = jun,

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doi = "10.1021/acs.nanolett.6b00051",

language = "English",

volume = "16",

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journal = "Nano Letters: a journal dedicated to nanoscience and nanotechnology",

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Kammhuber, J, Cassidy, MC, Zhang, H, Gül, Ö, Pei, F, De Moor, MWA, Nijholt, B, Watanabe, K, Taniguchi, T, Car, D, Plissard, SR, Bakkers, EPAM & Kouwenhoven, LP 2016, 'Conductance Quantization at Zero Magnetic Field in InSb Nanowires', Nano Letters: a journal dedicated to nanoscience and nanotechnology, vol. 16, no. 6, pp. 3482-3486. https://doi.org/10.1021/acs.nanolett.6b00051

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T1 - Conductance Quantization at Zero Magnetic Field in InSb Nanowires

AU - Kammhuber, Jakob

AU - Cassidy, Maja C.

AU - Zhang, H.

AU - Gül, Önder

AU - Pei, F.

AU - De Moor, Michiel W.A.

AU - Nijholt, Bas

AU - Watanabe, Kenji

AU - Taniguchi, Takashi

AU - Car, Diana

AU - Plissard, Sébastien R.

AU - Bakkers, Erik P.A.M.

AU - Kouwenhoven, Leo P.

PY - 2016/6/8

Y1 - 2016/6/8

N2 - Ballistic electron transport is a key requirement for existence of a topological phase transition in proximitized InSb nanowires. However, measurements of quantized conductance as direct evidence of ballistic transport have so far been obscured due to the increased chance of backscattering in one-dimensional nanowires. We show that by improving the nanowire-metal interface as well as the dielectric environment we can consistently achieve conductance quantization at zero magnetic field. Additionally we study the contribution of orbital effects to the sub-band dispersion for different orientation of the magnetic field, observing a near-degeneracy between the second and third sub-bands.

AB - Ballistic electron transport is a key requirement for existence of a topological phase transition in proximitized InSb nanowires. However, measurements of quantized conductance as direct evidence of ballistic transport have so far been obscured due to the increased chance of backscattering in one-dimensional nanowires. We show that by improving the nanowire-metal interface as well as the dielectric environment we can consistently achieve conductance quantization at zero magnetic field. Additionally we study the contribution of orbital effects to the sub-band dispersion for different orientation of the magnetic field, observing a near-degeneracy between the second and third sub-bands.

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KW - nanowire

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JF - Nano Letters: a journal dedicated to nanoscience and nanotechnology

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Conductance Quantization at Zero Magnetic Field in InSb Nanowires

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