Schwinger-boson calculation for a frustrated antiferromagnet

Article

关键词: HEISENBERG MODELS;    GROUND-STATE;    QUANTUM;    SRCU2(BO3)(2);   

DOI  :  10.1103/PhysRevB.65.024438

来源: SCIE

【 摘 要 】

The application of the Schwinger-boson transformation to quantum Heisenberg magnets is briefly reviewed, beginning with the derivation of a rotationally invariant mean-field theory. The inclusion of Gaussian fluctuations is discussed in some detail for a general (non-Bravais) lattice, extending available results for simple lattices. Numerical results are presented for the ground-state energy of the Shastry-Sutherland model, and possible future refinements of the method are outlined.

【 授权许可】

Free