Year: 2004
Type: article
Abstract: To understand anomalous transport properties of ${\mathrm{EuB}}_{6},$ we have studied the spin-polaron Hamiltonian incorporating the electron-magnon and electron-phonon interactions. Assuming a strong exchange interaction between carriers and the localized spins, the electrical conductivity is calculated. The temperature and magnetic-field dependences of the resistivity of ${\mathrm{EuB}}_{6}$ are well explained. At low temperature, magnons dominate the conduction process, whereas the lattice contribution becomes significant at very high temperature due to the scattering with the phonons. Large negative magnetoresistance near the ferromagnetic transition is also reproduced as observed in ${\mathrm{EuB}}_{6}.$
Source: Physical Review B
Authors: Jayita Chatterjee, Unjong Yu, B. I. Min
Institution: Pohang University of Science and Technology
Language: Latvian
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1977408900