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Classical topological paramagnetism
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DOI：10.1103/PhysRevB.95.174418.png)
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摘要
En 中文
Topological phases of matter are one of the hallmarks of quantum condensed matter physics. One of their striking features is a bulk-boundary correspondence wherein the topological nature of the bulk manifests itself on boundaries via exotic massless phases. In classical wave phenomena, analogous effects may arise; however, these cannot be viewed as equilibrium phases of matter. Here, we identify a set of rules under which robust equilibrium classical topological phenomena exist. We write simple and analytically tractable classical lattice models of spins and rotors in two and three dimensions which, at suitable parameter ranges, are paramagnetic in the bulk but nonetheless exhibit some unusual long-range or critical order on their boundaries. We point out the role of simplicial cohomology as a means of classifying, writing, and analyzing such models. This opens an experimental route for studying strongly interacting topological phases of spins.
Keyword:
ARTIFICIAL SPIN ICE
LATTICE
MODELS
PHASES
STATES
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期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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分享收藏Classifying quantum phases using matrix product states and projected entangled pair states.png)
PHYSICAL REVIEW B
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PHYSICAL REVIEW BIF3.7
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