Abstract
The electric and thermal conductivity of weak itinerant-electron ferromagnets in the presence of spin fluctuations and disorder is calculated and the validity of the Wiedemann-Franz law in these systems is discussed. We used the Keldysh-diagram technique to obtain the expression for the conductivities of the clean system as well as the correction due to disorder. The electric conductivity shows a maximum at a low temperature, which characterizes the crossover behavior from the disorder-dominated region to the spin-fluctuation region. The thermal conductivity (κ/T) also has a maximum at the crossover temperature. The contribution due to spin fluctuations and the quantum correction due to disorder violate the Wiedemann-Franz law while the Drude term restores it as disorder increases
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
