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Title: Spin-Selective Kondo Insulator: Cooperation of Ferromagnetism and the Kondo Effect
Authors: Peters, Robert  kyouindb  KAKEN_id
Kawakami, Norio  kyouindb  KAKEN_id  orcid (unconfirmed)
Pruschke, Thomas
Issue Date: Feb-2012
Publisher: American Physical Society
Journal title: Physical Review Letters
Volume: 108
Issue: 8
Thesis number: 086402
Abstract: We propose the notion of a spin-selective Kondo insulator, which provides a fundamental mechanism to describe the ferromagnetic phase of the Kondo lattice model with antiferromagnetic coupling. This unveils a remarkable feature of the ferromagnetic metallic phase: the majority-spin conduction electrons show metallic while the minority-spin electrons show insulating behavior. The resulting Kondo gap in the minority-spin sector, which is due to the cooperation of ferromagnetism and partial Kondo screening, evidences a dynamically induced commensurability for a combination of minority-spin electrons and parts of localized spins. Furthermore, this mechanism predicts a nontrivial relation between the macroscopic quantities such as electron magnetization, spin polarization, and electron filling.
Rights: © 2012 American Physical Society.
DOI(Published Version): 10.1103/PhysRevLett.108.086402
PubMed ID: 22463547
Appears in Collections:Journal Articles

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