TY - RPRT
TI - Schwinger-boson studies of the single hole motion in a 2d quantum antiferromagnet
AB - Within 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.
AU - Wu, C Q
AU - Yu, L [International Centre for Theoretical Physics, Trieste (Italy)]
AU - Su, Z B [Academia Sinica, Beijing, BJ (China). Inst. of Theoretical Physics]
KW - 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
KW - ANTIFERROMAGNETIC MATERIALS
KW - BOGOLYUBOV METHOD
KW - HOLES
KW - GREEN FUNCTION
KW - HEISENBERG MODEL
KW - HIGH-TC SUPERCONDUCTORS
KW - ORDER PARAMETERS
KW - SCHWINGER VARIATIONAL METHOD
KW - SPIN
KW - TWO-DIMENSIONAL CALCULATIONS
KW - WAVE FUNCTIONS
KW - 665400
KW - QUANTUM PHYSICS ASPECTS OF CONDENSED MATTER
DO -
UR -
PB -
CY - IAEA
PY - 1994
DA - 1994-09-01
LA - English
J2 -
C1 - International Centre for Theoretical Physics (ICTP), Trieste (Italy)
C2 -
ER -