期刊
PHYSICAL REVIEW LETTERS
卷 126, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.126.135701
关键词
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资金
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [414456783]
- Gauss Centre for Supercomputing e.V.
The study reveals the existence of a special phase transition and an extraordinary phase with logarithmically decaying correlations in the presence of a bidimensional surface in the three-dimensional Heisenberg universality class. These findings help explain some recent puzzling results on the boundary critical behavior of quantum spin models.
We study the boundary critical behavior of the three-dimensional Heisenberg universality class, in the presence of a bidimensional surface. By means of high-precision Monte Carlo simulations of an improved lattice model, where leading bulk scaling corrections are suppressed, we prove the existence of a special phase transition, with unusual exponents, and of an extraordinary phase with logarithmically decaying correlations. These findings contrast with naive arguments on the bulk-surface phase diagram, and allow us to explain some recent puzzling results on the boundary critical behavior of quantum spin models.
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