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- W2788176583 abstract "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." @default.
- W2788176583 created "2018-03-06" @default.
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- W2788176583 date "1996-12-24" @default.
- W2788176583 modified "2023-09-27" @default.
- W2788176583 title "Spin-carrying spin polarons in the t-J model" @default.
- W2788176583 hasPublicationYear "1996" @default.
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