We study the "phase diagram" of a Hubbard plaquette with Rashba spin-orbit coupling. We show that the peculiar way in which Rashba coupling breaks the spin-rotational symmetry of the Hubbard model allows a mixing of singlet and triplet components in the ground state that slows down and changes the nature of the Mott transition and of the Mott insulating phases. © 2018 American Physical Society.
Pauli metallic ground state in Hubbard clusters with Rashba spin-orbit coupling
Brosco V.;Capone M.
2018
Abstract
We study the "phase diagram" of a Hubbard plaquette with Rashba spin-orbit coupling. We show that the peculiar way in which Rashba coupling breaks the spin-rotational symmetry of the Hubbard model allows a mixing of singlet and triplet components in the ground state that slows down and changes the nature of the Mott transition and of the Mott insulating phases. © 2018 American Physical Society.File in questo prodotto:
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PhysRevB.97.125103.pdf
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Descrizione: Pauli metallic ground state in Hubbard clusters with Rashba spin-orbit coupling
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