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Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2023

Metamagnetic transition in the two f orbitals Kondo lattice model

Résumé

In this work, we study the effects of a transverse magnetic field in a Kondo lattice model with two f orbitals interacting with the conduction electrons. The f electrons that are present on the same site interact through Hund’s coupling, while on neighboring sites they interact through intersite exchange. We consider here that part of f electrons are localized (orbital 1) while another part (orbital 2) are delocalized, as it is frequent in uranium systems. Then, only electrons in the localized orbital 1 interact through exchange interaction with the neighboring ones, while electrons in orbital 2 are coupled with conduction electrons through a Kondo interaction. We obtain a solution where ferromagnetism and Kondo effect coexist for small values of an applied transverse magnetic field for T → 0 . Increasing the transverse field, two situations can be obtained when Kondo coupling vanishes: first, a metamagnetic transition occurs just before or at the same time of the fully polarized state, and second, a metamagnetic transition occurs when the spins are already pointing out along the magnetic field.
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Dates et versions

hal-04600223 , version 1 (04-06-2024)

Identifiants

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Christopher Thomas, Sébastien Burdin, Claudine Lacroix. Metamagnetic transition in the two f orbitals Kondo lattice model. Journal of Physics: Condensed Matter, 2023, 35 (44), pp.445601. ⟨10.1088/1361-648X/ace57a⟩. ⟨hal-04600223⟩

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