Tensor Network Approach for the Two-Dimensional Kondo Lattice
Final Report Abstract
The present research project aims at the investigation of the effect of geometrical frustration in strongly correlated electron systems in low dimensions. The low dimensionality leads to strong quantum effects and a wealth of exotic states of matter in related materials including high-temperature super conductivity, collective order of chargeor orbital degrees of freedom and non-Fermi liquid behavior. Using modern tensor-network approaches, it was possible to detect a new exotic phase in the strongly frustrated Kondo-Necklace model and to map out its entire magnetic phase diagram. While previous studies predicted a ground state which exhibit partial Kondo screening, it was shown that this ground state does only exist in a part of the phasediagram and that it is in strong competition with a new phase. This new phase allows for a natural interpretation of the whole phase diagram and unifies the understanding of the influence of geometrical frustration to the Doniach competition.
Publications
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Competing states in the two-dimensional frustrated Kondo-necklace model. Physical Review B, 106(20).
Peschke, Matthias; Ponsioen, Boris & Corboz, Philippe
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Magnetic properties of a capped kagome molecule with 60 quantum spins. SciPost Physics, 12(5).
Rausch, Roman; Peschke, Matthias; Plorin, Cassian & Karrasch, Christoph
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“Competing states in the two-dimensional Kondo-Necklace model on the triangular lattice”, poster contribution at International Conference on Strongly Correlated Electron Systems (SCES), 2022.
M. Peschke
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“Competing states in the two-dimensional Kondo-Necklace model”, poster contribution at International Conference on Highly Frustrated Magnetism (HFM), 2022.
M. Peschke
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Itinerant Magnetism in the Triangular Lattice Hubbard Model at Halfdoping: Application to Twisted Transition-Metal Dichalcogenides
Y. He; R. Rausch; M. Peschke; C. Karrasch; P. Corboz; N. Bultinck & S. A. Parameswaran
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Quantum spin spiral ground state of the ferrimagnetic sawtooth chain. SciPost Physics, 14(3).
Rausch, Roman; Peschke, Matthias; Plorin, Cassian; Schnack, Jürgen & Karrasch, Christoph
