Frahm, Holger; Pfannmüller, M.P.; Tsvelik, A.M.
(College Park (Maryland) : American Physical Society, 1998)
An exactly soluble model describing a spin S=1 antiferromagnetic chain doped with mobile S=1/2 carriers is constructed. In its continuum limit the undoped state is described by three gapless Majorana fermions composing the ...