Article Dans Une Revue Physical Review B Année : 2025

Revealing spinons by proximity effect

Résumé

The ghost-Gutzwiller variational wavefunction within the Gutzwiller approximation is shown to stabilise a genuine paramagnetic Mott insulator in the half-filled single-band Hubbard model. This phase hosts quasiparticles that are crucial to the paramagnetic response without showing up in the single-particle spectrum, and, as such, they can be legitimately regarded as an example of Anderson's spinons. We demonstrate that these spinons at the interface with a metal reacquire charge by proximity effect and thus reemerge in the spectrum as a heavy-fermion band.

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hal-05042718 , version 1 (22-04-2025)

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Antonio Maria Tagliente, Carlos Mejuto-Zaera, Michele Fabrizio. Revealing spinons by proximity effect. Physical Review B, 2025, 111 (12), pp.125110. ⟨10.1103/PhysRevB.111.125110⟩. ⟨hal-05042718⟩
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