2006/11/08 by M. F. Smith
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic Properties of Alloys #Rare-earth and actinide compounds #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.74.172403
published as Phys. Rev. B, 74, 172403 (2006) · 4 pages, 1 figure
openalex publication_date 2006/11/08 · arxiv created 2006/11/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A possible explanation is given for the anomalous T3∕2 temperature dependence of the electrical resistivity of MnSi, which is observed in the high-pressure paramagnetic state. The unusual Fermi surface of MnSi includes large open sheets that intersect along the faces of the cubic Brillouin zone. Close to these intersections, long-wavelength interband magnetic spin fluctuations can scatter electrons from one sheet to the other. The current relaxation rate due to such interband scattering events is not reduced by vertex corrections as is that for scattering from intraband ferromagnetic fluctuations. Consequently, current relaxation proceeds in a manner similar to that occurring in nearly antiferromagnetic metals, in which low-temperature T3∕2 behavior is well known. It is argued that this type of non-Fermi-liquid behavior can, for a metal with ferromagnetic fluctuations near Fermi sheet intersections, persist over a much wider temperature range than it does in nearly antiferromagnetic metals.