Publications in Scientific Journals:
J. Glasbrenner, K. Belashchenko, J. Kudrnovsky, V. Drchal, S. Khmelevskyi, I. Turek:
"First-principles study of spin-disorder resistivity of heavy rare-earth metals: Gd-Tm series";
Physical Review B,
Electrical resistivity of heavy rare-earth metals has a dominant contribution from thermal spin-disorder
scattering. Here this spin-disorder resistivity is calculated for theGd-Tm series of metals in the paramagnetic state.
Calculations are performed within the tight-binding linear muffin-tin orbital method using two complementary
methods: (1) averaging of the Landauer-Bšuttiker conductance of a supercell over random noncollinear
spin-disorder configurations, and (2) linear response calculations with the spin-disordered state described in
the coherent potential approximation. The agreement between these two methods is found to be excellent. The
spin-disorder resistivity in the series follows an almost universal dependence on the exchange splitting. While
the crystallographic anisotropy of the spin-disorder resistivity agrees well with experiment, its magnitude is
significantly underestimated. These results suggest that the classical picture of slowly rotating self-consistent local moments is inadequate for rare-earth metals. A simple quantum correction improves agreement with experiment
but does not fully account for the discrepancy, suggesting that more complicated scattering mechanisms may be
Created from the Publication Database of the Vienna University of Technology.