Spin-charge correlations in finite one-dimensional multiband Fermi systems
We investigate spin-charge separation of a spin-1/2 Fermi system confined in a triple well where multiple bands are occupied. We assume that our finite fermionic system is close to fully spin polarized while being doped by a hole and an impurity fermion with opposite spin. Our setup involves ferroma...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2023-10-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.5.043039 |
| _version_ | 1797210410366009344 |
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| author | J. M. Becker G. M. Koutentakis P. Schmelcher |
| author_facet | J. M. Becker G. M. Koutentakis P. Schmelcher |
| author_sort | J. M. Becker |
| collection | DOAJ |
| description | We investigate spin-charge separation of a spin-1/2 Fermi system confined in a triple well where multiple bands are occupied. We assume that our finite fermionic system is close to fully spin polarized while being doped by a hole and an impurity fermion with opposite spin. Our setup involves ferromagnetic couplings among the particles in different bands, leading to the development of strong spin-transport correlations in an intermediate interaction regime. Interactions are then strong enough to lift the degeneracy among singlet and triplet spin configurations in the well of the spin impurity but not strong enough to prohibit hole-induced magnetic excitations to the singlet state. Despite the strong spin-hole correlations, the system exhibits spin-charge deconfinement allowing for long-range entanglement of the spatial and spin degrees of freedom. |
| first_indexed | 2024-04-24T10:10:09Z |
| format | Article |
| id | doaj.art-e7508a26ba3b484298dec5e74ce3b4f6 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:10:09Z |
| publishDate | 2023-10-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-e7508a26ba3b484298dec5e74ce3b4f62024-04-12T17:35:00ZengAmerican Physical SocietyPhysical Review Research2643-15642023-10-015404303910.1103/PhysRevResearch.5.043039Spin-charge correlations in finite one-dimensional multiband Fermi systemsJ. M. BeckerG. M. KoutentakisP. SchmelcherWe investigate spin-charge separation of a spin-1/2 Fermi system confined in a triple well where multiple bands are occupied. We assume that our finite fermionic system is close to fully spin polarized while being doped by a hole and an impurity fermion with opposite spin. Our setup involves ferromagnetic couplings among the particles in different bands, leading to the development of strong spin-transport correlations in an intermediate interaction regime. Interactions are then strong enough to lift the degeneracy among singlet and triplet spin configurations in the well of the spin impurity but not strong enough to prohibit hole-induced magnetic excitations to the singlet state. Despite the strong spin-hole correlations, the system exhibits spin-charge deconfinement allowing for long-range entanglement of the spatial and spin degrees of freedom.http://doi.org/10.1103/PhysRevResearch.5.043039 |
| spellingShingle | J. M. Becker G. M. Koutentakis P. Schmelcher Spin-charge correlations in finite one-dimensional multiband Fermi systems Physical Review Research |
| title | Spin-charge correlations in finite one-dimensional multiband Fermi systems |
| title_full | Spin-charge correlations in finite one-dimensional multiband Fermi systems |
| title_fullStr | Spin-charge correlations in finite one-dimensional multiband Fermi systems |
| title_full_unstemmed | Spin-charge correlations in finite one-dimensional multiband Fermi systems |
| title_short | Spin-charge correlations in finite one-dimensional multiband Fermi systems |
| title_sort | spin charge correlations in finite one dimensional multiband fermi systems |
| url | http://doi.org/10.1103/PhysRevResearch.5.043039 |
| work_keys_str_mv | AT jmbecker spinchargecorrelationsinfiniteonedimensionalmultibandfermisystems AT gmkoutentakis spinchargecorrelationsinfiniteonedimensionalmultibandfermisystems AT pschmelcher spinchargecorrelationsinfiniteonedimensionalmultibandfermisystems |