4,962 research outputs found
Size-independent Shear Band Formation in Amorphous Nanowires made from Simulated Casting
Molecular dynamics simulations indicate that surfaces strongly influence the
strain localization behavior of amorphous nanowires in tension. A sample
preparation routine that simulates casting was employed to facilitate the
relaxation of the sample surface. Samples as short as 15 nm (7.5 nm in
diameter) form dominant shear bands during deformation. The elastic energy
release during plastic deformation is sufficient to provide the excess
potential energy required for the shear band nucleation at rather small sample
sizes. The results show that shear band formation is almost size-independent
and is bounded only by its own length scale.Comment: 13 pages, 3 figures, to be appeared in Appl. Phys. Let
Entanglement Entropy in Integrable Field Theories with Line Defects II. Non-topological Defect
This is the second part of two papers where we study the effect of integrable
line defects on bipartite entanglement entropy in integrable field theories. In
this paper, we consider non-topological line defects in Ising field theory. We
derive an infinite series expression for the entanglement entropy and show that
both the UV and IR limits of the bulk entanglement entropy are modified by the
line defect. In the UV limit, we give an infinite series expression for the
coefficient in front of the logarithmic divergence and the exact defect
-function. By tuning the defect to be purely transmissive and reflective, we
recover correctly the entanglement entropy of the bulk and with integrable
boundary.Comment: 30 pages, references added, typos corrected, publication versio
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