Shadow wave function variational calculation of bond orientational order and disclination in liquid and solidLi Hui1, 2, Li Ying1, Liu Yingcai1, Dong Shunle1 and F. Pederiva2
1 Physics Department, Ocean University of China - Qingdao, PRC
2 Physics Department, University of Trento - I-38050, Povo, Trento, Italy
received 25 April 2005; accepted in final form 2 November 2005
published online 2 December 2005
By means of shadow wave function (SWF), a variational Monte Carlo simulation of 500 particles has been performed to study bond orientational order and disclination defects in liquid and solid . Convincing evidence is presented that this structural order can be interpreted as entanglement and interpenetration of defective icosahedra sharing common vertexes and faces. Thereby, it is demonstrated that a defect as those observed in quantum solid is due to the relatively large-amplitude vibration of atoms. The matching relation of bonds which is used to form a defective icosahedron has been discussed in this paper.
67.40.-w - Boson degeneracy and superfluidity of .
67.40.Yv - Impurities and other defects.
© EDP Sciences 2005