Crystallization of the resonating valence bond liquid as vortex condensation

Article

关键词: FUNCTION MONTE-CARLO;    HEISENBERG-ANTIFERROMAGNET;    KAGOME ANTIFERROMAGNET;    TRIANGULAR LATTICE;    STATE;    MODEL;    EXCITATIONS;   

DOI  :  10.1103/PhysRevB.76.140404

来源: SCIE

【 摘 要 】

We show that the liquid-to-crystal quantum phase transition in the Rokhsar-Kivelson dimer model on the two-dimensional triangular lattice occurs as a condensation of vortexlike excitations called visons. This conclusion is drawn from numerical studies of the vison spectrum in the liquid phase by using the Green's function Monte Carlo method. We find that visons remain the lowest excitation throughout the liquid phase and that their gap decreases continuously to zero at the phase transition. The nature of the crystal phase and the second order of the phase transition are in agreement with an earlier prediction of Moessner and Sondhi.

【 授权许可】

Free