Spectral characteristics of the antiferromagnetic spin-1/2 Heisenberg model on the square lattice in a magnetic fieldWe predict that spin-waves in an ordered square quantum antiferromagnet in a transverse magnetic field (h) may demonstrate three modes of spin excitations. Starting from the self-...
Michaud, F, Mila, F (2013) Phase diagram of the spin-1 Heisenberg model with three-site interactions on the square lattice. Phys. Rev. B 88: pp. 094435Phase diagram of the spin-1 Heisenberg model with three-site interactions on the square lattice. Michaud F,Mila F. Physical Review B ...
On the other hand, in 2006, Alexei Kitaev13 proposed an exactly solvable S = 1/2 model on the honeycomb lattice (Fig. 1d), which has substantially advanced the field. This model, as in Eq. 1, is named the Kitaev model. $$H \, = \, - K_x\mathop {\sum }\limits_{x \,...
Ground-state and finite-temperature phase diagrams of a geometrically frustrated spin-1/2 Ising-Heisenberg model on a triangle-hexagon lattice are investigated within the generalized star-triangle mapping transformation. It is shown that the ground state is constituted by two different spontaneously long...
Thelow-energypropertiesofthetwo-dimensionalHeisenbergmodelwithspin- 1 2 on asquarelatticeareinvestigatedonthebasisofthelocaldimerorder.Thelatticeis dividedintosquareblocksconsistingofthequartetofspins.Thespinvariablesandthe HeisenbergHamiltonianareexpressedintermsofthelow-energyquartetvariables.On thebasisoftheDyson...
model, spin 1/2 antiferromagnetic Heisenberg model on Kagome lattice，以及J1-J2 model。
model, spin 1/2 antiferromagnetic Heisenberg model on Kagome lattice，以及J1-J2 model。三角格子上...
We perform a Gutzwiller projected-wave-function study for the spin-1/2 Heisenberg model on the Kagomé lattice to compare energies of several spin-liquid states. The result indicates that a U(1)-Dirac spin-liquid state has the lowest energy. Furthermore, even without variational parameters, the...
W. Some new variational resonating-valence-bond-type wave functions for the spin-½ antiferromagnetic Heisenberg model on a square lattice. Phys. Rev. Lett. 61, 365–368 (1988). Article ADS CAS PubMed Google Scholar Alet, F., Walczak, A. M. & Fisher, M. P. A. Exotic quantum ...
Results Model. We consider a long-range SU(2)-symmetric Heisenberg model on a square lattice H ¼J ∑ hi;ji Si Á Sj þ γ∑ i≠j Si Á jrij Sj jα ; ð1Þ with Si ¼ ðSxi ; Syi ; Szi Þ spin-1/2 operators on the lattice site i, J > 0 the nearest-...