%AWu, C Q
%AYu, L [International Centre for Theoretical Physics, Trieste (Italy)]
%ASu, Z B [Academia Sinica, Beijing, BJ (China). Inst. of Theoretical Physics]
%D1994
%I; International Centre for Theoretical Physics (ICTP), Trieste (Italy)
%J
%K75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY, ANTIFERROMAGNETIC MATERIALS, BOGOLYUBOV METHOD, HOLES, GREEN FUNCTION, HEISENBERG MODEL, HIGH-TC SUPERCONDUCTORS, ORDER PARAMETERS, SCHWINGER VARIATIONAL METHOD, SPIN, TWO-DIMENSIONAL CALCULATIONS, WAVE FUNCTIONS, 665400, QUANTUM PHYSICS ASPECTS OF CONDENSED MATTER
%PMedium: X; Size: 17 p.
%TSchwinger-boson studies of the single hole motion in a 2d quantum antiferromagnet
%XWithin the Schwinger-boson approach for the t-J model, the single hole problem in a two-dimensional quantum antiferromagnet is studied by using the quantum Bogoliubov-de Gennes formalism which treats the distortion of the spin background and quantum spin fluctuations on an equal footing. Several self-trapped localized hole states are found in the distorted spin-background as in the case of an anisotropic Heisenberg model. These localized hole states survive at finite temperatures when the antiferromagnetic order becomes short-ranged. The energy separation between the two lowest states is reduced by considering the spin-background distortion, but it remains finite. (author). 17 refs, 5 figs, 1 tab.
%0Technical Report
IAEA Other: ON: DE95614444; TRN: XA9438394014019 INIS English