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VOLUME 57 (1993) | ISSUE 9 | PAGE 584
Nature of the pseudogap in the energy spectrum of CeNiSn
It is shown that interaction with crystal-field excitations can cause a pseudogap to appear in the spectrum of heavy-fermion compounds with a nearly integer valence. The necessary conditions for the appearance of a pseudogap are formulated and it is demonstrated that these conditions are realized in the compound CeNiSn. Suppression of the pseudogap by an external magnetic field is studied.