Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-11-06
Physical Review B 59, 9285 (1999).
Physics
Condensed Matter
Strongly Correlated Electrons
38 pages, including 12 figures
Scientific paper
10.1103/PhysRevB.59.9285
We present a general theory for the intermediate temperature (T) properties of Heisenberg antiferromagnets of spin-S ions on p-leg ladders, valid for 2Sp even or odd. Following an earlier proposal for 2Sp even (Damle and Sachdev, cond-mat/9711014), we argue that an integrable, classical, continuum model of a fixed-length, 3-vector applies over an intermediate temperature range; this range becomes very wide for moderate and large values of 2Sp. The coupling constants of the effective model are known exactly in terms of the energy gap above the ground state (for 2Sp even) or a crossover scale (for 2Sp odd). Analytic and numeric results for dynamic and transport properties are obtained, including some exact results for the spin-wave damping. Numerous quantitative predictions for neutron scattering and NMR experiments are made. A general discussion on the nature of T>0 transport in integrable systems is also presented: an exact solution of a toy model proves that diffusion can exist in integrable systems, provided proper care is taken in approaching the thermodynamic limit.
Buragohain Chiranjeeb
Sachdev Subir
No associations
LandOfFree
Intermediate temperature dynamics of one-dimensional Heisenberg antiferromagnets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Intermediate temperature dynamics of one-dimensional Heisenberg antiferromagnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intermediate temperature dynamics of one-dimensional Heisenberg antiferromagnets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-584444