| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1859581 | Physics Letters A | 2015 | 5 Pages |
•We study the extension of 1D Hubbard model by modulating the hopping term.•We study the effect of the induced interactions on topology of phase diagram of the model.•In the absence of V, an insulator–metal transition takes place.•In the presence of U and V, the induced three-body interaction breaks an accident symmetry.•We present a theoretical argument for the occurrence of the TS and BSDW phases.
By introducing a modulation parameter (ξ), we study the one-dimensional correlated system with modulated hopping, on-site (U) and nearest-neighbor (V ) repulsions in the weak-coupling regime. The induced three-body attraction changes topology of the conventional phase diagram. Besides the usual CDW and SDW phases, a BSDW phase exists for |U−2V|<8tξ2/π|U−2V|<8tξ2/π. In the absence of V , an insulator–metal transition takes place, and the TS phase is realized for ξ>πU/8t. Phenomenologically, the general quantum phase diagram including insulating and superconducting phases is discussed.
