Commensurate Antiferromagnetic Fluctuations with Small Electron Doping
Fuente:
arXiv
Salvato in:
| Autori principali: | , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2024
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866929563804631040 |
|---|---|
| author | Shahbazi, Mohsen Maleki, Mohammad Ali |
| author_facet | Shahbazi, Mohsen Maleki, Mohammad Ali |
| contents | We investigate the presence of antiferromagnetic fluctuations in the longitudinal and transversal spin susceptibilities of a square lattice. The inclusion of both first and second neighbour hopping terms, along with exchange coupling, induces anti-ferromagnetic fluctuations over a finite range of fillings in both longitudinal and transversal static spin susceptibilities. In the absence of on-site Hubbard interaction, we observe incommensurate antiferromagnetic fluctuations between the two Van Hove fillings. Beyond the second Van Hove singularity at $ n=1.03 $, commensurate antiferromagnetic fluctuations dominate in both longitudinal and transversal spin susceptibilities. When incorporating a finite Hubbard interaction strength, $ U $, we find that the commensurate anti-ferromagnetic fluctuations are preserved in both longitudinal and transversal dressed spin susceptibilities. However anti-ferromagnetic fluctuations vanish beyond a critical value of the Hubbard coupling strength, $ U_{c} $. Despite the exchange field can be induced by a ferromagnetic substrate, we do not observe any ferromagnetic fluctuations in the system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_09814 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Commensurate Antiferromagnetic Fluctuations with Small Electron Doping Shahbazi, Mohsen Maleki, Mohammad Ali Strongly Correlated Electrons Other Condensed Matter We investigate the presence of antiferromagnetic fluctuations in the longitudinal and transversal spin susceptibilities of a square lattice. The inclusion of both first and second neighbour hopping terms, along with exchange coupling, induces anti-ferromagnetic fluctuations over a finite range of fillings in both longitudinal and transversal static spin susceptibilities. In the absence of on-site Hubbard interaction, we observe incommensurate antiferromagnetic fluctuations between the two Van Hove fillings. Beyond the second Van Hove singularity at $ n=1.03 $, commensurate antiferromagnetic fluctuations dominate in both longitudinal and transversal spin susceptibilities. When incorporating a finite Hubbard interaction strength, $ U $, we find that the commensurate anti-ferromagnetic fluctuations are preserved in both longitudinal and transversal dressed spin susceptibilities. However anti-ferromagnetic fluctuations vanish beyond a critical value of the Hubbard coupling strength, $ U_{c} $. Despite the exchange field can be induced by a ferromagnetic substrate, we do not observe any ferromagnetic fluctuations in the system. |
| title | Commensurate Antiferromagnetic Fluctuations with Small Electron Doping |
| topic | Strongly Correlated Electrons Other Condensed Matter |
| url | https://arxiv.org/abs/2407.09814 |