Insulator phases of Bose-Fermi mixtures induced by intraspecies next-neighbor interactions
We study a one-dimensional mixture of two-color fermions and scalar bosons at the hardcore limit, focusing on the effect that the intraspecies next-neighbor interactions have on the zero-temperature ground state of the system for different fillings of each carrier. Exploring the problem's param...
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2025-01-01
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| Series: | SciPost Physics Core |
| Online Access: | https://scipost.org/SciPostPhysCore.8.1.007 |
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| author | Felipe Gómez-Lozada, Roberto Franco, Jereson Silva-Valencia |
| author_facet | Felipe Gómez-Lozada, Roberto Franco, Jereson Silva-Valencia |
| author_sort | Felipe Gómez-Lozada, Roberto Franco, Jereson Silva-Valencia |
| collection | DOAJ |
| description | We study a one-dimensional mixture of two-color fermions and scalar bosons at the hardcore limit, focusing on the effect that the intraspecies next-neighbor interactions have on the zero-temperature ground state of the system for different fillings of each carrier. Exploring the problem's parameters, we observed that the nearest-neighbor interaction could favor or harm the well-known mixed Mott and spin-selective Mott insulators. We also found the emergence of three unusual insulating states with charge density wave (CDW) structures in which the orders of the carriers are out of phase between each other. For instance, the immiscible CDW appears only at half-filling bosonic density, whereas the mixed CDW state is characterized by equal densities of bosons and fermions. Finally, the spin-selective CDW couples the bosons and only one kind of fermions. Appropriate order parameters were proposed for each phase to obtain the critical parameters for the corresponding superfluid-insulator transition. Our results can inspire or contribute to understanding experiments in cold-atom setups with long-range interactions or recent reports involving quasiparticles in semiconductor heterostructures. |
| format | Article |
| id | doaj-art-5882ced1320244a2b2e7f3fa1bb71b3c |
| institution | Kabale University |
| issn | 2666-9366 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics Core |
| spelling | doaj-art-5882ced1320244a2b2e7f3fa1bb71b3c2025-01-21T13:12:58ZengSciPostSciPost Physics Core2666-93662025-01-018100710.21468/SciPostPhysCore.8.1.007Insulator phases of Bose-Fermi mixtures induced by intraspecies next-neighbor interactionsFelipe Gómez-Lozada, Roberto Franco, Jereson Silva-ValenciaWe study a one-dimensional mixture of two-color fermions and scalar bosons at the hardcore limit, focusing on the effect that the intraspecies next-neighbor interactions have on the zero-temperature ground state of the system for different fillings of each carrier. Exploring the problem's parameters, we observed that the nearest-neighbor interaction could favor or harm the well-known mixed Mott and spin-selective Mott insulators. We also found the emergence of three unusual insulating states with charge density wave (CDW) structures in which the orders of the carriers are out of phase between each other. For instance, the immiscible CDW appears only at half-filling bosonic density, whereas the mixed CDW state is characterized by equal densities of bosons and fermions. Finally, the spin-selective CDW couples the bosons and only one kind of fermions. Appropriate order parameters were proposed for each phase to obtain the critical parameters for the corresponding superfluid-insulator transition. Our results can inspire or contribute to understanding experiments in cold-atom setups with long-range interactions or recent reports involving quasiparticles in semiconductor heterostructures.https://scipost.org/SciPostPhysCore.8.1.007 |
| spellingShingle | Felipe Gómez-Lozada, Roberto Franco, Jereson Silva-Valencia Insulator phases of Bose-Fermi mixtures induced by intraspecies next-neighbor interactions SciPost Physics Core |
| title | Insulator phases of Bose-Fermi mixtures induced by intraspecies next-neighbor interactions |
| title_full | Insulator phases of Bose-Fermi mixtures induced by intraspecies next-neighbor interactions |
| title_fullStr | Insulator phases of Bose-Fermi mixtures induced by intraspecies next-neighbor interactions |
| title_full_unstemmed | Insulator phases of Bose-Fermi mixtures induced by intraspecies next-neighbor interactions |
| title_short | Insulator phases of Bose-Fermi mixtures induced by intraspecies next-neighbor interactions |
| title_sort | insulator phases of bose fermi mixtures induced by intraspecies next neighbor interactions |
| url | https://scipost.org/SciPostPhysCore.8.1.007 |
| work_keys_str_mv | AT felipegomezlozadarobertofrancojeresonsilvavalencia insulatorphasesofbosefermimixturesinducedbyintraspeciesnextneighborinteractions |