Electronic properties of EuB6 in the ferromagnetic regime: Half-metal versus semiconductor

Abstract

To understand the halfmetallic ferromagnet EuB6 we use the Kondo lattice model for valence and conduction band. By means of a recently developed many-body theory we calculate the electronic properties in the ferromagnetic regime up to the Curie temperature. The decreasing magnetic order induces a transition from halfmetallic to semiconducting behavior along with a band broadening. We show the temperature dependence of the quasiparticle density of states and the quasiparticle dispersion as well as the effective mass, the number of carriers and the plasma frequency which are in good agreement with the experimental data.

References in corpus (7)

• Kondo and anti-Kondo coupling to local moments in EuB${}_6$
• Magnetic phase separation in EuB6 detected by muon spin rotation
• Low density approach to the Kondo-lattice model
• Double Exchange Model for Magnetic Hexaborides
• Spin-polaron model: transport properties of EuB${}_6$
• Optical spectroscopy study on the electronic structure of $E{u}_{1-x}C{a}_x{B}_6$
• Dynamical Mean Field Theory of Temperature and Field Dependent Band Shifts in Magnetically Coupled Semimetals: Applocation to EuB6

Cited by in corpus (9)

• Time-reversal symmetry breaking driven topological phase transition in EuB${}_6$
• Carrier induced ferromagnetism in diluted local-moment systems
• Magnetic Phase Diagrams of Manganites-like Local-Moment Systems with Jahn-Teller distortions
• Interacting spin waves in the ferromagnetic Kondo lattice model
• Half-metallic magnetization plateaux
• Spin-polarized tunneling currents through a ferromagnetic insulator between two metallic or superconducting leads
• Semimetallic Nature and Magnetic Polarons in EuB6 Studied by Angle-Resolved Photoemission Spectroscopy
• The ground state phase diagram of the diluted ferromagnetic Kondo-lattice model
• Two-band ferromagnetic Kondo-lattice model for local-moment half-metals