Effective Hamiltonian for Partial Order in Kondo Lattices
- Datum
- 31.05.2024
- Zeit
- 13:30 - 14:30
- Sprecher
- Prof. Dr. Sanjeev Kumar
- Zugehörigkeit
- IISER Mohali, Dept. of Physical Sciences
- Sprache
- en
- Hauptthema
- Materialien
- Host
- Grit Rötzer
- Beschreibung
- . We propose an effective Hamiltonian approach to understand a variety of partially magnetically ordered phases in a Kondo lattice. Such partial order, where only selected sites are Kondo-screened while the others develop local moments, have been observed in many heavy-fermion compounds. The proposed effective Hamiltonian retains two important features of the fundamental Kondo-lattice model: (i) formation of a Kondo singlet leading to complete vanishing of the local magnetic moment, and (ii) spatially correlated nature of the electronic kinetic energy. The Hamiltonian belongs to a class of coupled classical-quantum models that can be reliably analysed using hybrid Monte Carlo simulations. I will try to motivate the model and demonstrate the approach for the case of a square lattice where we unveiled a number of magnetic phases with magnetic moments surviving only on a fraction of lattice sites. I will further motivate a fully classical spin model to describe the partial magnetic order in Kondo lattices. .
- Links
Letztmalig verändert: 31.05.2024, 07:38:58
Veranstaltungsort
Leibniz Institut für Festkörper- und Werkstoffforschung Dresden (D2E.27, IFW Dresden)Helmholtzstraße2001069Dresden
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- http://www.ifw-dresden.de
Veranstalter
Leibniz Institut für Festkörper- und Werkstoffforschung DresdenHelmholtzstraße2001069Dresden
- Homepage
- http://www.ifw-dresden.de
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