Mortemousque PA, Rosenius S, Pica G, Franke DP, Sekiguchi T, Truong A, Vlasenko MP, Vlasenko LS, Brandt MS, Elliman RG, Itoh KM. Quadrupole shift of nuclear magnetic resonance of donors in silicon at low magnetic field.
Nanotechnology 2016;
27:494001. [PMID:
27823991 DOI:
10.1088/0957-4484/27/49/494001]
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Abstract
Shifts from the expected nuclear magnetic resonance frequencies of antimony and bismuth donors in silicon of greater than a megahertz are observed in electrically detected magnetic resonance spectra. Defects created by ion implantation of the donors are discussed as the source of effective electric field gradients generating these shifts via quadrupole interaction with the nuclear spins. The experimental results are modeled quantitatively by molecular orbital theory for a coupled pair consisting of a donor and a spin-dependent recombination readout center.
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