The resonating-valence-bond (RVB) theory for two-dimensional quantum antiferromagnets is shown to be the correct paradigm for large enough "quantum frustration." This scenario, proposed a long time ago but never confirmed by rnicroscopic calculations, is strongly supported by a new type of variational wave function, which is extremely close to the exact ground state of the J(1) - J(2) Heisenberg model for 0.4 less than or similar to J(2)/J(1) less than or similar to 0.5. This wave function is proposed to represent the generic spin-half RVB ground state in spin liquids.
Resonating valence bond wave functions for strongly frustrated spin systems / Capriotti, L; Becca, Federico; Parola, A; Sorella, Sandro. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 87:9(2001), pp. 1-4. [10.1103/PhysRevLett.87.097201]
Resonating valence bond wave functions for strongly frustrated spin systems
Becca, Federico;Sorella, Sandro
2001-01-01
Abstract
The resonating-valence-bond (RVB) theory for two-dimensional quantum antiferromagnets is shown to be the correct paradigm for large enough "quantum frustration." This scenario, proposed a long time ago but never confirmed by rnicroscopic calculations, is strongly supported by a new type of variational wave function, which is extremely close to the exact ground state of the J(1) - J(2) Heisenberg model for 0.4 less than or similar to J(2)/J(1) less than or similar to 0.5. This wave function is proposed to represent the generic spin-half RVB ground state in spin liquids.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
