Capriotti L, Becca F, Parola A, Sorella S
Istituto Nazionale per la Fisica della Materia, Unità di Firenze, I-50125 Firenze, Italy.
Phys Rev Lett. 2001 Aug 27;87(9):097201. doi: 10.1103/PhysRevLett.87.097201. Epub 2001 Aug 8.
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 microscopic 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 approximately J(2)/J(1) less than approximately 0.5. This wave function is proposed to represent the generic spin-half RVB ground state in spin liquids.
二维量子反铁磁体的共振价键（RVB）理论被证明是足够大的“量子阻挫”情况下的正确范例。这种情况早在很久以前就被提出，但从未通过微观计算得到证实，现在得到了一种新型变分波函数的有力支持，对于0.4≈J(2)/J(1)≈0.5的情况，该变分波函数极其接近J(1)-J(2)海森堡模型的精确基态。有人提出这个波函数代表自旋液体中一般的自旋-1/2 RVB基态。
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