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Giant, Level-Dependent g Factors in InSb Nanowire Quantum Dots
Abstract
We report on magnetotransport measurements on InSb nanowire quantum dots. The measurements show that the quantum levels of the InSb quantum dots have giant g factors, with absolute values up to approximately 70, the largest value ever reported for semiconductor quantum dots. We also observe that the values of these g factors are quantum level dependent and can differ strongly between different quantum levels. The presence of giant g factors indicates that considerable contributions from the orbital motion of electrons are preserved in the measured InSb nanowire quantum dots, while the level-to-level fluctuations arise from spin-orbit interaction. We have deduced a value of Delta(SO) = 280 mueV for the strength of spin-orbit interaction from an avoided level crossing between the ground state and first excited state of an InSb nanowire quantum dot with a fixed number of electrons.
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Cites
Quantum computation with quantum dots
Loss, D., & DiVincenzo, D. P. (1998) · Physical Review A · doi:10.1103/physreva.57.120 · Cited by 6,840
Cited by
Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices
Mourik, V., Zuo, K., Frolov, S. M., Plissard, S. R., Bakkers, E. P. A. M., & Kouwenhoven, L. P. (2012) · Science · doi:10.1126/science.1222360 · Cited by 4,163
Helical Liquids and Majorana Bound States in Quantum Wires
Oreg, Y., Refael, G., & von Oppen, F. (2010) · Physical Review Letters · doi:10.1103/physrevlett.105.177002 · Cited by 3,167
Anomalous Zero-Bias Conductance Peak in a Nb–InSb Nanowire–Nb Hybrid Device
Deng, M. T., Yu, C. L., Huang, G. Y., Larsson, M., Caroff, P., & Xu, H. Q. (2012) · Nano Letters · doi:10.1021/nl303758w · Cited by 1,620
Self-citationChurchill, H. O. H., Fatemi, V., Grove-Rasmussen, K., Deng, M. T., Caroff, P., Xu, H. Q., & Marcus, C. M. (2013) · Physical Review B · doi:10.1103/physrevb.87.241401 · Cited by 771
Self-citationMajorana fermions in semiconductor nanowires
Stanescu, T. D., Lutchyn, R. M., & Das Sarma, S. (2011) · Physical Review B · doi:10.1103/physrevb.84.144522 · Cited by 405
Metadata
- Authors
- Nilsson, H. A., Caroff, P., Thelander, C., Larsson, M., Wagner, J. B., Wernersson, L.-E., Samuelson, L., & Xu, H. Q.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-08-19
- Volume
- 9
- Issue
- 9
- Pages
- 3151-3156
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2041083659
- Cited by
- 258
- References
- 1
- FWCI
- 10.97
- Type
- journal article
- Language
- en
- Open access
- closed
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