In 1D Anderson and Kondo lattices, reservoir-mediated extended interactions produce near-long-range superconducting and magnetic correlations at intermediate scales before the insulating state dominates.
Fermi Surfaces in the Antiferromagnetic, Paramagnetic and Polarized Paramagnetic States of CeRh2Si2 Compared with Quantum Oscillation Experiments
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abstract
The large quantum oscillations observed in the thermoelectric power in the antiferromagnetic (AF) state of the heavy-fermion compound CeRh2Si2 disappear suddenly when entering in the polarized paramagnetic (PPM) state at Hc=26.5 T, indicating an abrupt reconstruction of the Fermi surface. The electronic band structure was [LDA+U] for the AF state taking the correct magnetic structure into account, for the PPM state, and for the paramagnetic state (PM). Different Fermi surfaces were obtained for the AF, PM, and PPM states. Due to band folding, a large number of branches was expected and observed in the AF state. The LDA+U calculation was compared with the previous LDA calculations. Furthermore, we compared both calculations with previously published de Haas-van Alphen experiments. The better agreement with the LDA approach suggests that above the critical pressure pc CeRh2Si2 enters in a mixed-valence state. In the PPM state under a high magnetic field, the 4f contribution at the Fermi level EF drops significantly compared with that in the PM state, and the 4f electrons contribute only weakly to the Fermi surface in our approach.
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2026 2verdicts
UNVERDICTED 2representative citing papers
Doping away from half-filling in superconducting-metallic bilayers breaks the balance between superconducting and density-density correlations in favor of the former, enabling near-long-range superconducting order not precluded by a small charge gap.
citing papers explorer
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Mapping reservoir-enhanced superconductivity to near-long-range magnetic order in the undoped one-dimensional Anderson and Kondo lattices
In 1D Anderson and Kondo lattices, reservoir-mediated extended interactions produce near-long-range superconducting and magnetic correlations at intermediate scales before the insulating state dominates.
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Enhancement of superconducting stiffness in hybrid superconducting-metallic bilayers
Doping away from half-filling in superconducting-metallic bilayers breaks the balance between superconducting and density-density correlations in favor of the former, enabling near-long-range superconducting order not precluded by a small charge gap.