Results 61 to 70 of about 2,678,219 (375)

Quantum Spin Hall Effect in 2D Transition Metal Dichalcogenide Haeckelites

open access: yes, 2015
By using first-principles calculation, we have found that a family of 2D transition metal dichalcogenide haeckelites with square-octagonal lattice $MX_2$-4-8 ($M$=Mo, W and $X$=S, Se and Te) can host quantum spin hall effect.
Fang, Zhong   +3 more
core   +1 more source

Realization of uniform synthetic magnetic fields by periodically shaking an optical square lattice [PDF]

open access: yes, 2016
Shaking a lattice system, by modulating the location of its sites periodically in time, is a powerful method to create effective magnetic fields in engineered quantum systems, such as cold gases trapped in optical lattices.
C. Creffield   +4 more
semanticscholar   +1 more source

Room temperature quantum spin Hall insulators with a buckled square lattice. [PDF]

open access: yesNano letters (Print), 2015
Two-dimensional (2D) topological insulators (TIs), also known as quantum spin Hall (QSH) insulators, are excellent candidates for coherent spin transport related applications because the edge states of 2D TIs are robust against nonmagnetic impurities ...
W. Luo, H. Xiang
semanticscholar   +1 more source

Percolation of dimers on square lattices

open access: yesPhysica A: Statistical Mechanics and its Applications, 2013
Abstract A theoretical approach, based on exact calculations of configurations on finite rectangular cells, is applied to study the percolation of homonuclear dimers on square lattices. An efficient algorithm allows us to calculate the detailed structure of the configuration space for M = L x × L y cells, with M varying ...
Lebrecht, W.   +4 more
openaire   +3 more sources

PHASE DIAGRAM OF A LOOP ON THE SQUARE LATTICE [PDF]

open access: yesInternational Journal of Modern Physics C, 1999
The phase diagram of the O (n) model, in particular the special case n=0, is studied by means of transfer-matrix calculations on the loop representation of the O (n) model. The model is defined on the square lattice; the loops are allowed to collide at the lattice vertices, but not to intersect.
Guo, W.N., Blote, H.W.J., Nienhuis, B.
openaire   +6 more sources

Dimer Covering and Percolation Frustration

open access: yes, 2015
Covering a graph or a lattice with non-overlapping dimers is a problem that has received considerable interest in areas such as discrete mathematics, statistical physics, chemistry and materials science.
Haji-Akbari, Amir   +2 more
core   +1 more source

Antiferromagnetic Potts models on the square lattice [PDF]

open access: yesPhysical Review B, 1995
9 pages including 6 figures, 288527 bytes Postscript (NYU-TH-94/05/01)
Sabino José Ferreira, Alan D. Sokal
openaire   +4 more sources

Double-Q Checkerboard Bubble Crystal in Centrosymmetric Tetragonal Magnets

open access: yesCondensed Matter
We report our numerical studies on the emergence of a double-Q checkerboard bubble crystal in centrosymmetric tetragonal magnets. The double-Q checkerboard bubble crystal is characterized by a fourfold-symmetric collinear spin configuration consisting of
Satoru Hayami
doaj   +1 more source

Poisson percolation on the square lattice

open access: yesLatin American Journal of Probability and Mathematical Statistics, 2019
9 pages, 3 ...
Cristali, Irina   +2 more
openaire   +3 more sources

Classical dimers on the triangular lattice [PDF]

open access: yes, 2002
We study the classical hard-core dimer model on the triangular lattice. Following Kasteleyn's fundamental theorem on planar graphs, this problem is soluble by Pfaffians.
C. Kenyon   +30 more
core   +1 more source

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