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Abstract The numerical solution of the Bethe ansatz equations of an integrableSU (2)-invariant generalization of the spin - S antiferromagnetic Heisenberg chain in zero magnetic field is presented ...
Abstract:Quenched disorders can strongly influence the physical properties of quantum many-body systems. The real-space strong-disorder renormalization group (SDRG) analysis has shown that the spin - 1 ...
(1986) 6063-6080. Printed in Great Britain Magnetic field properties of the integrable S = 1 isotropic quantum spin chain J B Parkinson and J C Bonnert Mathematics Department, UMIST, PO Box 88, Manchester ...
The low-energy structure and the thermodynamic properties of ferrimagnetic Heisenberg chains of alternating spins S and s are investigated by the use of numerical tools as well as the spin -wave ...
We present numerical and analytical results for the thermodynamical properties of the spin - 1 /2 Heisenberg chain at arbitrary external magnetic field. Special emphasis is placed on logarithmic ...
We calculate certain string correlation functions, originally introduced as order parameters in integer spin chains , for the spin - 1 /2 XXZ Heisenberg chain at zero temperature and in the thermodynamic ...
Thermodynamics of the frustrated ferromagnetic spin - 1 /2 Heisenberg chain 1 1 2 3 J. Richter , M. HÄartel , D. Ihle and S .-L. Drechsler Institut fur Ä Theoretische Physik, UniversitÄat Magdeburg, D-39016 Magdeburg ...
at low temperatures before showing a peak around 0.5 K. The latter behavior except the peak resembles that of the spin - 1 /2 Heisenberg ferromagnetic chain , which probably arises from the low lying ...
The authors construct a mixed spin - 1 /2 and spin - S integrable model and investigate its finite-size properties . For a certain conformal invariant mixed spin system the central charge can be decomposed ...
The ground state spin -wave excitations and thermodynamic properties of two types of ferrimagnetic chains are investigated: the alternating spin - 1 /2 spin -5/2 chain and a similar chain with a spin - 1 /2 ...
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