2010/09/30 by Grégory Strübi, Д. А. Иванов, Dmitri A. Ivanov · 2 citations
Physics and Astronomy · #Dimer #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum and electron transport phenomena #Quantum mechanics #Statistical physics #Topological Materials and Phenomena #cond-mat.str-el
paper · pdf · doi:10.1209/0295-5075/94/57003
published in Europhysics Letters (EPL) 94(5), 57003 (Institute of Physics) · 6 pages, 2 figures, minor corrections corresponding to the published version
openalex publication_date 2011/05/24 · arxiv created 2011/05/30 · arxiv updated 2011/05/31 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study vison excitations in a quantum dimer model interpolating between the Rokhsar-Kivelson models on the square and triangular lattices. In the square-lattice case, the model is known to be critical and characterized by U (1) topological quantum numbers. Introducing diagonal dimers brings the model to a Z 2 resonating-valence-bond phase. We study variationally the emergence of vison excitations at low concentration of diagonal dimers, close to the critical point. We find that, in this regime, vison excitations are large in size and their structure resembles vortices in type-II superconductors.