Direct calculation of spin stiffness for spin-1/2 Heisenberg models
- 1 August 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 50 (5) , 3415-3418
- https://doi.org/10.1103/physrevb.50.3415
Abstract
The spin stiffness of frustrated spin-1/2 Heisenberg models in one and two dimensions is computed by exact diagonalizations on small clusters that implement spin-dependent twisted boundary conditions. Finite-size extrapolation to the thermodynamic limit yields a value of 0.14±0.01 for the spin stiffness of the unfrustrated planar antiferromagnet. We also present a general discussion of the linear-response theory for spin twists, which ultimately leads to the moment sum rule.Keywords
All Related Versions
This publication has 17 references indexed in Scilit:
- Dynamical properties of antiferromagnetic Heisenberg spin chainsPhysical Review B, 1993
- Spin-liquid phase for the frustrated quantum Heisenberg antiferromagnet on a square latticePhysical Review B, 1993
- 1/Sexpansion for thermodynamic quantities in a two-dimensional Heisenberg antiferromagnet at zero temperaturePhysical Review B, 1992
- Fluid-dimer critical point in S = antiferromagnetic Heisenberg chain with next nearest neighbor interactionsPhysics Letters A, 1992
- The spin-½ Heisenberg antiferromagnet on a square lattice and its application to the cuprous oxidesReviews of Modern Physics, 1991
- A quantum fluids approach to frustrated Heisenberg modelsJournal of Physics: Condensed Matter, 1990
- Twisted boundary conditions and effective mass in Heisenberg-Ising and Hubbard ringsPhysical Review Letters, 1990
- Quantum spin chains and the Haldane gapJournal of Physics: Condensed Matter, 1989
- Theory of the Insulating StatePhysical Review B, 1964
- Hydrodynamic equations and correlation functionsAnnals of Physics, 1963