Open AccessКонденсация (псевдо)магнонов в двумерной анизотропной S=1 (псевдо)спиновой системе
Author(s) -
Е.В. Васинович,
А.С. Москвин,
Ю.Д. Панов
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.11.46647.05nn
Subject(s) - boson , physics , condensed matter physics , paramagnetism , formalism (music) , superconductivity , ground state , anisotropy , valence (chemistry) , quantum mechanics , art , musical , visual arts
—A 2D anisotropic system of S = 1 centers of the charge triplet type in systems with variable valence or “semi-hard-core” boson systems with a limitation for the occupation of lattice sites n = 0, 1, 2 is studied in the framework of the pseudospin formalism. Assuming that the ground state is a quantum paramagnet, the pseudo-spin wave spectrum and also the conditions of the condensation of pseudomagnons with a phase transition to a superconducting state have been found using the Schwinger boson method.