Abstract
The YbB12 Kondo insulator was studied by EPR. The energy spectrum of YbB12 was established to have a gap of width 2Δ≈12 meV. The experimental data are interpreted in terms of the excitonic-dielectric model. The temperature behavior of the gap was determined; it was found that Δ(T)=72 K at absolute zero and vanishes at ∼115 K.
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Translated from Fizika Tverdogo Tela, Vol. 44, No. 8, 2002, pp. 1465–1468.
Original Russian Text Copyright © 2002 by Al’tshuler, Bresler.
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Al’tshuler, T.S., Bresler, M.S. On the nature of the energy gap in ytterbium dodecaboride YbB12 . Phys. Solid State 44, 1532–1535 (2002). https://doi.org/10.1134/1.1501353
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DOI: https://doi.org/10.1134/1.1501353