Sliding phases in XY models, crystals, and cationic lipid-DNA complexes

被引:94
作者
O'Hern, CS [1 ]
Lubensky, TC
Toner, J
机构
[1] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
[2] Univ Oregon, Inst Theoret Sci, Inst Mat Sci, Eugene, OR 97403 USA
[3] Univ Oregon, Dept Phys, Eugene, OR 97403 USA
基金
美国国家科学基金会;
关键词
D O I
10.1103/PhysRevLett.83.2745
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We predict the existence of a new class of phases in weakly coupled, three-dimensional stacks of two-dimensional (2D) XY models. These "sliding phases" behave like decoupled, independent 2D XY models with zero free-energy cost for macroscopic relative rotation of spins in different layers and algebraic decay of two-point spin correlation functions with in-plane separation. Our results, which contradict past studies because we include higher-gradient couplings between layers, also apply to crystals and may explain recently observed behavior in cationic lipid-DNA complexes.
引用
收藏
页码:2745 / 2748
页数:4
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