scholarly journals Exact diagonalization and cluster mean-field study of triangular-lattice XXZ antiferromagnets near saturation

2017 ◽  
Vol 96 (1) ◽  
Author(s):  
Daisuke Yamamoto ◽  
Hiroshi Ueda ◽  
Ippei Danshita ◽  
Giacomo Marmorini ◽  
Tsutomu Momoi ◽  
...  
Keyword(s):  
Field Study ◽  
Triangular Lattice ◽  
Mean Field ◽  
Exact Diagonalization

scholarly journals Mean-Field Study of Charge, Spin, and Orbital Orderings in Triangular-Lattice CompoundsANiO2(A= Na, Li, Ag)

2011 ◽  
Vol 80 (4) ◽  
pp. 044705 ◽  
Author(s):  
Hiroshi Uchigaito ◽  
Masafumi Udagawa ◽  
Yukitoshi Motome
Keyword(s):  
Field Study ◽  
Triangular Lattice ◽  
Mean Field

scholarly journals OPTIMIZING THE RVB STATE ON A TRIANGULAR LATTICE: PRESENCE OF THE LONG RANGE ORDER

1994 ◽  
Vol 08 (20) ◽  
pp. 1253-1260 ◽  
Author(s):  
YONG-CONG CHEN
Keyword(s):  
Long Range ◽  
Triangular Lattice ◽  
Mean Field ◽  
Exact Diagonalization ◽  
Heisenberg Antiferromagnet ◽  
Spin Correlations ◽  
Consistent Approximation ◽  
Finite Lattices ◽  
Field State ◽  
The Mean

We present a Schwinger boson approach for the RVB state of the spin-1/2 Heisenberg antiferromagnet on a triangular lattice. It is shown that a Gutzwiller projection of the mean field state that includes both antiferromagnetic and ferromagnetic decouplings leads to optimizing the RVB pair amplitudes within a self-consistent approximation. The resulting state yields, by Monte Carlo simulations, energies and spin-spin correlations in excellent agreement with the exact diagonalization result on finite lattices (up to 36 sites). We conclude that the optimized RVB wave function possesses a long range three-sublattice order.

scholarly journals A beyond mean-field study of the Tavis-Cummings model

2019 ◽  
Author(s):  
C. Tejera-Centeno ◽  
P. Pérez-Fernández ◽  
J. M. Arias
Keyword(s):  
Field Study ◽  
Mean Field

scholarly journals Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study

2019 ◽  
Vol 122 (12) ◽  
Author(s):  
D. Geffroy ◽  
J. Kaufmann ◽  
A. Hariki ◽  
P. Gunacker ◽  
A. Hausoel ◽  
...  
Keyword(s):  
Field Study ◽  
Mean Field ◽  
Collective Modes
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