Dynamic and static properties of two-sublattice anisotropic non-Heisenberg magnet

Yarygina, E.A.; Matyunina, Ya. Yu.; Klevets, Ph.N.; Fridman, Yu. A.

doi:10.1016/j.jmmm.2020.167043

Cited by 4 publications

(1 citation statement)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Currently, these systems are actively studied using various methods, from molecular field theory to the Green's function method for the Hubbard operators (see, e.g., Ref. [27]).…”

Section: Large Variety Of Phases Described By Spin-pseudospin Hamilto...mentioning

confidence: 99%

Model of charge triplets for high-T$_c$ cuprates

Moskvin,

Panov

2021

Preprint

View full text Add to dashboard Cite

Starting with a minimal model for the CuO 2 planes with the on-site Hilbert space reduced to a charge triplet of the three effective valence centers [CuO 4 ] 7−,6−,5− (nominally Cu 1+,2+,3+ ) with different conventional spin, different orbital symmetry, and different local lattice configuration, we develop a unified non-BCS spin-pseudospin model to describe the main phase states of doped cuprates. We argue that antiferromagnetic insulating, charge ordered, superconducting, and Fermi-liquid phases are possible phase states of a model parent cuprate, while typical phase state of a doped cuprate, in particular mysterious pseudogap phase, is a result of a phase separation. Superconductivity of cuprates is not a consequence of pairing of doped holes, but the result of quantum transport of on-site composite hole bosons, whereas main peculiarities of normal state can be related to an electron-hole interplay for unusual Fermi-liquid phase and features of the phase separation. Puzzlingly, but it is the electron-lattice interaction, which in the BCS model determines s-wave pairing, in the model of local composite bosons gives d x 2 −y 2 -symmetry of the superconducting order parameter, thus showing once again a substantial involvement of the lattice in the cuprate's HTSC.

show abstract

“…Currently, these systems are actively studied using various methods, from molecular field theory to the Green's function method for the Hubbard operators (see, e.g., Ref. [27]).…”

Section: Large Variety Of Phases Described By Spin-pseudospin Hamilto...mentioning

confidence: 99%