129 research outputs found
Resolution of Entropy by Ordering in Two-Channel Kondo Lattice
Peculiar property of electronic order is clarified for the two-channel Kondo
lattice. With two conduction electrons per site, the order parameter is a
composite quantity involving both local and itinerant degrees of freedom. In
contrast to the ordinary Kondo lattice, a heavy electron band is absent above
the transition temperature, but is rapidly formed below it. The change of
entropy associated with the ordering is found to be close to per
site. This entropy corresponds to the residual entropy in a two-channel Kondo
impurity, which has been regarded as due to localized free Majorana particles.
The present composite order is interpreted as instability of Majorana particles
toward non-Kramers conduction electrons plus heavy fermions that involve
localized electrons.Comment: 9 pages, 11 figure
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