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Thermodynamics of a Spin-1/2 Chain Coupled to Einstein Phonons
Alexander Bühler, Götz S. Uhrig, Jaan Oitmaa
A high order series expansion is employed to study the thermodynamical properties of a S=1/2 chain coupled to dispersionless phonons. The results are obtained without truncating th…
The Mixed Spin S=(1/2,1) XXZ Ferrimagnet at Zero Temperature
Weihong Zheng, J. Oitmaa
Linked cluster series expansions about the Ising limit are used to study ground state preperties, viz. ground state energy, magnetization and excitation spectra, for mixed spin S=(…
Series Expansions for Variable Electron Density
Zheng Weihong, C. J. Hamer, J. Oitmaa +1
We have developed a series expansion method for calculating the zero-temperature properties of lattice electron models for variable electron density, i.e. for finite doping away fr…
The Phase Diagram of the Shastry-Sutherland Antiferromagnet
Zheng Weihong, J. Oitmaa, C. J. Hamer
The Shastry-Sutherland model, which provides a representation of the magnetic properties of SrCu(BO), has been studied by series expansion methods at T=0. Our results s…