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 4 He. 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 4 He atoms. The matching relation of bonds which is used to form a defective icosahedron has been discussed in this paper.
Shadow wave function variational calculation of bond orientational order and disclination in liquid and solid He-4
Pederiva, Francesco
2006-01-01
Abstract
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 4 He. 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 4 He atoms. The matching relation of bonds which is used to form a defective icosahedron has been discussed in this paper.File in questo prodotto:
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