Open Access
Nature Communications, volume 13, issue 1, publication number 3637
Spin relaxation in a single-electron graphene quantum dot
Luca Banszerus
1, 2
,
K. Hecker
1, 2
,
S. Möller
1, 2
,
E. Icking
1, 2
,
Kenji Watanabe
3
,
Toshio TAMGUCHI
4
,
C. Volk
1, 2
,
Christoph Stampfer
1, 2
3
Publication type: Journal Article
Publication date: 2022-06-25
Journal:
Nature Communications
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 16.6
ISSN: 20411723, 20411723
General Chemistry
General Biochemistry, Genetics and Molecular Biology
Multidisciplinary
General Physics and Astronomy
Abstract
The relaxation time of a single-electron spin is an important parameter for solid-state spin qubits, as it directly limits the lifetime of the encoded information. Thanks to the low spin-orbit interaction and low hyperfine coupling, graphene and bilayer graphene (BLG) have long been considered promising platforms for spin qubits. Only recently, it has become possible to control single-electrons in BLG quantum dots (QDs) and to understand their spin-valley texture, while the relaxation dynamics have remained mostly unexplored. Here, we report spin relaxation times (T1) of single-electron states in BLG QDs. Using pulsed-gate spectroscopy, we extract relaxation times exceeding 200 μs at a magnetic field of 1.9 T. The T1 values show a strong dependence on the spin splitting, promising even longer T1 at lower magnetic fields, where our measurements are limited by the signal-to-noise ratio. The relaxation times are more than two orders of magnitude larger than those previously reported for carbon-based QDs, suggesting that graphene is a potentially promising host material for scalable spin qubits. Graphene has long been considered to be a promising host for spin qubits, however a demonstration of long spin relaxation times for a potential qubit has been lacking. Here, the authors report the electrical measurement of the single-electron spin relaxation time exceeding 200 μs in a bilayer graphene quantum dot.
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Citations by publishers
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9 publications, 39.13%
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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GOST
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Banszerus L. et al. Spin relaxation in a single-electron graphene quantum dot // Nature Communications. 2022. Vol. 13. No. 1. 3637
GOST all authors (up to 50)
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Banszerus L., Hecker K., Möller S., Icking E., Watanabe K., TAMGUCHI T., Volk C., Stampfer C. Spin relaxation in a single-electron graphene quantum dot // Nature Communications. 2022. Vol. 13. No. 1. 3637
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TY - JOUR
DO - 10.1038/s41467-022-31231-5
UR - https://doi.org/10.1038/s41467-022-31231-5
TI - Spin relaxation in a single-electron graphene quantum dot
T2 - Nature Communications
AU - Banszerus, Luca
AU - Hecker, K.
AU - Möller, S.
AU - Icking, E.
AU - Watanabe, Kenji
AU - TAMGUCHI, Toshio
AU - Volk, C.
AU - Stampfer, Christoph
PY - 2022
DA - 2022/06/25 00:00:00
PB - Springer Nature
IS - 1
VL - 13
SN - 2041-1723
SN - 2041-1723
ER -
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@article{2022_Banszerus,
author = {Luca Banszerus and K. Hecker and S. Möller and E. Icking and Kenji Watanabe and Toshio TAMGUCHI and C. Volk and Christoph Stampfer},
title = {Spin relaxation in a single-electron graphene quantum dot},
journal = {Nature Communications},
year = {2022},
volume = {13},
publisher = {Springer Nature},
month = {jun},
url = {https://doi.org/10.1038/s41467-022-31231-5},
number = {1},
doi = {10.1038/s41467-022-31231-5}
}