ISSN:
1434-6036
Keywords:
PACS. 75.10.Jm Quantized spin models - 75.40.Cx Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.) - 75.45.+j Macroscopic quantum phenomena in magnetic systems
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: We study the occurrence of plateaux and jumps in the magnetization curves of a class of frustrated ladders for which the Hamiltonian can be written in terms of the total spin of a rung. We argue on the basis of exact diagonalization of finite clusters that the ground state energy as a function of magnetization can be obtained as the minimum - with Maxwell constructions if necessary - of the energies of a small set of spin chains with mixed spins. This allows us to predict with very elementary methods the existence of plateaux and jumps in the magnetization curves in a large parameter range, and to provide very accurate estimates of these magnetization curves from exact or DMRG results for the relevant spin chains.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100510051120
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