Spin polarons in the t-J model in an unconstrained representation
| dc.creator | Dotsenko, A. V. | |
| dc.date | 1996-12-24 | |
| dc.date | 1997-10-24 | |
| dc.date.accessioned | 2026-07-07T09:02:36Z | |
| dc.date.available | 2026-07-07T09:02:36Z | |
| dc.description | The report discusses the slave-fermion representations of the t-J model and describes another representation, in which fermions and bosons are completely commuting and in which the properties of fermions are directly related to the properties of physical holes. For a study of the system in the new representation at half-filling, interaction of fermions with two magnons is treated in mean-field theory. The obtained effective model, in comparison to that of the usual slave-fermion representation, has an additional bare hole dispersion due to the hole moving by using quantum spin fluctuations present in the undoped antiferromagnetic ground state. The single-hole Green's function at half-filling is then found numerically using the self-consistent Born approximation. For all studied quantities good or excellent agreement with numerical data is observed in the entire parameter range, noticeably better than in the studies with the slave-fermion representation. Using the same effective model, the two-hole problem is also studied by solving numerically the Bethe-Salpeter equation with noncrossing diagrams. | |
| dc.description | REVTeX 14 pages + PostScript figures. Revision: drastic changes in interpretation and more detailed comparison | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9612215 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9612215 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/148690 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Spin polarons in the t-J model in an unconstrained representation | |
| dc.type | text |