Nature of First-Order Transition in Planar Rotator Model with Modified Potential

• 作者: Smita Ota Snehadri Bihari Ota
• 来源期刊: 现代物理(英文)
• 学科: 物理学
• 关键词: XY-Model SPIN WAVE VORTICES
• 年，卷（期）: 2013,（1）
• 页码范围: 140-145
• 页数: 6页
• 分类号: O4

摘要

We have carried out micro-canonical Monte Carlosimulations of a planar rotator model in 30 × 30 lattice using periodic boundary conditions. The energy distribution of the rotator in the lattice shows features that can be associated with spin wave and vortex excitations. The results supplement the first-order transition observed in canonicalMonte Carlosimulation, due to vortex nucleation. We also see features that can be associated with the in-homogeneity of vortex charge in the critical region.