Unconventional One-Magnon Scattering Resistivity in Half-Metals : Condensed Matter: Electronic Properties, etc.

概要

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Low-temperature resistivity of half-metals is investigated. To date it has been discussed that the one-magnon scattering process in half-metals is irrelevant for low-temperature resistivity, due to the fully spin-polarized electronic structure at the ground sate. If one takes into account the non-rigid-band behavior of the minority band due to spin fluctuations at finite temperatures, however, the unconventional one-magnon scattering process is shown to be most relevant and gives T^3 dependence in resistivity. This behavior may be used as a crucial test in the search for half-metallic materials which are potentially important for applications. Comparison with resistivity data of La_<1-x>Sr_xMnO_3 as candidates for half-metals shows good agreement.
社団法人日本物理学会の論文
2000-07-15