Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Hanqin Ding"'
Publikováno v:
Results in Physics, Vol 65, Iss , Pp 107983- (2024)
By the bosonization and renormalization-group schemes, a half-filled Hubbard chain with density-dependent hopping is investigated at weak coupling. The model involved has an electron–hole symmetry and an SO(4) symmetry. The phase diagram consists o
Externí odkaz:
https://doaj.org/article/921740d733b145d59fbdcac80363d68b
Publikováno v:
Results in Physics, Vol 64, Iss , Pp 107925- (2024)
Using the field-theory approach combining bosonization and renormalization group, we investigate the weak-coupling phase diagram of the unconventional Hubbard chain, where in addition to a bond–charge interaction (X), the Hubbard interaction differ
Externí odkaz:
https://doaj.org/article/319fb804780746d5ae311d3d1b5a8ffc
Publikováno v:
Results in Physics, Vol 49, Iss , Pp 106472- (2023)
At non-half-filling, a one-dimensional interacting electronic model (t–U–R) is studied analytically. The particular correlated hopping keeps particle–hole symmetry of the Hubbard model. Physically, the model involved is equivalent to an extende
Externí odkaz:
https://doaj.org/article/a15ab5a5f9964aa68cd53b547df5c11a
Autor:
Jing Yu, Hanqin Ding
Publikováno v:
Results in Physics, Vol 44, Iss , Pp 106169- (2023)
At half filling, we study analytically a one-dimensional correlated electronic system modeled by an extended Penson–Kolb–Hubbard (PKH) chain with the occupation-dependent hopping. The modification of the electron hopping amplitude is exhibited to
Externí odkaz:
https://doaj.org/article/6c17a6218e8a4656b16fc5c555603bbe
Autor:
Yan Xu, Hanqin Ding
Publikováno v:
Results in Physics, Vol 41, Iss , Pp 105921- (2022)
The ground-state properties of a 1D modified Penson–Kolb–Hubbard model characterized by alternating Hubbard interaction at odd and even sites are discussed by the bosonization scheme and the renormalization group analysis. At quarter filling, the
Externí odkaz:
https://doaj.org/article/a586708bbab64f8286b04a3895e6ecf8
Publikováno v:
Results in Physics, Vol 39, Iss , Pp 105670- (2022)
At weak coupling and at half filling, we analytically study effects of an intersite three-electron density interaction (P) of the one-dimensional extended Hubbard model in addition to the usual two-electron density interactions (U,V). By the bosoniza
Externí odkaz:
https://doaj.org/article/50ea8bdd5f3e4f5fb3ae9fcd4f19d236
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
Abstract The one-dimensional antiferromagnetic correlated electron system described by the unusual t–U–J model with alternating on-site interactions at odd ( $$U_o$$ U o ) and even ( $$U_e$$ U e ) sites is studied analytically. At weak coupling,
Externí odkaz:
https://doaj.org/article/405602b46f6148028a922df29b2aa711
Publikováno v:
Results in Physics, Vol 34, Iss , Pp 105250- (2022)
In the weak-coupling regime, we analytically investigate phase diagram of a one-dimensional half-filled extended Hubbard model with nearest neighboring four-electron interaction (Q), in addition to the usual two-electron couplings (U,V>0). The additi
Externí odkaz:
https://doaj.org/article/e8e235c57014422385e0f53d7cec2cbb
Publikováno v:
Results in Physics, Vol 24, Iss , Pp 104206- (2021)
The one-dimensional unconventional Hubbard model with alternating on-site interaction at odd (Uo) and even (Ue) lattice sites is analytically studied in the weak-coupling regime. The existence of unequal on-site repulsion (Uo≠Ue) makes a dramatic i
Externí odkaz:
https://doaj.org/article/ef5042106e204bb2896791cf83f7d70a
Publikováno v:
Chinese Journal of Physics. 67:222-229
By the field theory approach, we investigate a one-dimensional correlated electronic system modelled by the extended Hubbard Hamiltonian including a nearest-neighbor and a next-nearest-neighbor spin-exchange interactions with easy-axis anisotropy. At