Spin-wave velocity and susceptibility for the two-dimensional Heisenberg antiferromagnet

1989 ◽  
Vol 40 (16) ◽  
pp. 11328-11330 ◽  
Author(s):  
Mark Gross ◽  
Eduardo Sánchez-Velasco ◽  
Eric D. Siggia
Keyword(s):  
Spin Wave ◽  
Wave Velocity ◽  
Two Dimensional ◽  
Heisenberg Antiferromagnet

THE FINITE-SIZE PROPERTIES OF THE SQUARE LATTICE QUANTUM HEISENBERG ANTIFERROMAGNET

2001 ◽  
Vol 15 (02) ◽  
pp. 61-68
Author(s):  
YUN SONG
Keyword(s):  
Spin Wave ◽  
Wave Velocity ◽  
Low Temperatures ◽  
Finite Size ◽  
Wave Theory ◽  
Square Lattice ◽  
Finite Size Effect ◽  
Heisenberg Antiferromagnet ◽  
Lattice Size ◽  
Lattice Quantum

We study the spin-1/2 square lattice Heisenberg antiferromagnets with finite size by the nonlinear spin-wave theory. At low temperatures, the effects of the lattice size (L×L) on the spin-wave velocity and the staggered magnetization are obtained, respectively. We find that the staggered magnetization is very sensitive to the lattice size, while the finite size effect on the spin-wave velocity is weak. Moreover, the temperature dependence of the correlation length is also discussed. The results we have obtained are in agreement with the results of experiments and numerical simulations.

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