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Valkov, V.V., Ovchinnikov, S.G. and Petrakovskii, O.P. (1986) The Excitation Spectra of Two-Magnon Systems in Easy-Axis Quasidimensional Ferromagnets. Sov. Phys. Solid State, 30, 3044-3047.

has been cited by the following article:

• TITLE: The Structure of Essential Spectra and Discrete Spectrum of Three-Electron Systems in the Impurity Hubbard Model—Quartet State

  AUTHORS: S. M. Tashpulatov

  KEYWORDS: Essential Spectrum, Discrete Spectrum, Three-Electron System, Local Impurity States, Impurity Hubbard Model, Quartet State, Doublet State

  JOURNAL NAME: Journal of Applied Mathematics and Physics, Vol.9 No.6, June 30, 2021

  ABSTRACT: We consider a three-electron system in the Impurity Hubbard model with a coupling between nearest-neighbors. Our research aim consists of studying the structure of essential spectrum and discrete spectra of the energy operator of three-electron systems in the impurity Hubbard model in the quartet state of the system in a v-dimensional lattice. We have reduced the study of the spectrum of the three-electron quartet state operator in the impurity Hubbard model to the study of the spectrum of a simpler operator. We proved the essential spectra of the three-electron systems in the Impurity Hubbard model in the quartet state is the union of no more than six segments, and the discrete spectrum of the system is consists of no more than four eigenvalues.