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Ballistic one-dimensional holes with strong g-factor anisotropy in germanium
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Mizokuchi, R., Maurand, R., Vigneau, F., Myronov, Maksym and De Franceschi, S. (2018) Ballistic one-dimensional holes with strong g-factor anisotropy in germanium. Nano Letters, 18 (8). pp. 4861-4865. doi:10.1021/acs.nanolett.8b01457 ISSN 1530-6992.
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Official URL: https://doi.org/10.1021/acs.nanolett.8b01457
Abstract
We report experimental evidence of ballistic hole transport in one-dimensional quantum wires gate-defined in a strained SiGe/Ge/SiGe quantum well. At zero magnetic field, we observe conductance plateaus at integer multiples of 2e2/h. At finite magnetic field, the splitting of these plateaus by Zeeman effect reveals largely anisotropic g-factors with absolute values below 1 in the quantum-well plane, and exceeding 10 out-of-plane. This g-factor anisotropy is consistent with a heavy-hole character of the propagating valence-band states, which is in line with a predominant confinement in the growth direction. Remarkably, we observe quantized ballistic conductance in device channels up to 600 nm long. These findings mark an important step toward the realization of novel devices for applications in quantum spintronics.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
SWORD Depositor: | Library Publications Router | ||||||||
Library of Congress Subject Headings (LCSH): | Exciton theory, Germanium, One-dimensional conductors, Spintronics | ||||||||
Journal or Publication Title: | Nano Letters | ||||||||
Publisher: | American Chemical Society (ACS) | ||||||||
ISSN: | 1530-6992 | ||||||||
Official Date: | 8 August 2018 | ||||||||
Dates: |
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Volume: | 18 | ||||||||
Number: | 8 | ||||||||
Page Range: | pp. 4861-4865 | ||||||||
DOI: | 10.1021/acs.nanolett.8b01457 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 30 January 2020 | ||||||||
Date of first compliant Open Access: | 30 January 2020 | ||||||||
RIOXX Funder/Project Grant: |
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