Article Dans Une Revue Solid State Communications Année : 1972

Indirect exchange interactions in semimetals

D. Jérome

Résumé

The indirect exchange interaction between localized spins and nuclear spins through conduction electrons is discussed in connection with the interband susceptibility in semimetals. A simple calculation is performed for a model band structure where the valence band and the conduction band are separated by a vector Q in reciprocal space. An additional internal field superimposed to the RKKY field is derived. The short-wavelength modulation of the new mechanism provides a magnetic decoupling for nuclei close to paramagnetic centers, inhibiting the spin diffusion process. It is suggested that Ytterbium could be a good nucleus for the observation of interband mechanisms in NMR.

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hal-04944428 , version 1 (22-03-2025)

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D. Jérome. Indirect exchange interactions in semimetals. Solid State Communications, 1972, 11 (6), pp.819-824. ⟨10.1016/0038-1098(72)90279-7⟩. ⟨hal-04944428⟩
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