On a negative thermal expansion in heavy fermion systems |
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Authors: | E.P. Fetisov D.I. Khomskii |
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Affiliation: | Moscow Physical Engineering Institute, Moscow, USSR;P.N. Lebedev Physics Institute, Moscow, USSR |
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Abstract: | We explain negative thermal expansion observed in some heavy fermion systems at low temperatures within a two-component Fermi-liquid picture: α may become negative if Fermi-level falls on a region of steep increase in the density-of-states. The results obtained account for the correlation between the sign of thermal expansion and that of thermopower, and give certain information about the band structure of these systems. |
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