Modelling spin qubits in carbon peapods
We have calculated electron spin interactions in chains of Sc@C82 endohedral fullerenes in isolation and inserted into a semiconducting or metallic single-walled carbon nanotube to form a peapod. Using hybrid density functional theory (DFT), we find that the spin resides mainly on the fullerene cage...
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Main Authors | , , , , , |
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Format | Journal Article |
Language | English |
Published |
16.10.2007
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Subjects | |
Online Access | Get full text |
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Summary: | We have calculated electron spin interactions in chains of Sc@C82 endohedral
fullerenes in isolation and inserted into a semiconducting or metallic
single-walled carbon nanotube to form a peapod. Using hybrid density functional
theory (DFT), we find that the spin resides mainly on the fullerene cage,
whether or not the fullerenes are in a nanotube. The spin interactions decay
exponentially with fullerene separation, and the system can be described by a
simple antiferromagnetic Heisenberg spin chain. A generalised Hubbard-Anderson
model gives an exchange parameter J and a Coulomb parameter U in good agreement
with the DFT values. Within the accuracy of the calculations, neither
semiconducting nor metallic nanotubes affect the interactions between the
fullerene electron spins. |
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DOI: | 10.48550/arxiv.0710.3061 |