Phase Transitions Topology Noncollinear Spin Structures Euler Characteristic
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1. Topologia, Simetria e transições de fase em Modelos de Spin
We use a topological approach to describe the frustration- and field-induced phase transitions exhibited by the infinite-range XY model on the AB2 chain, including noncollinear spin structures. For this purpose, we have computed the Morse number and the Euler characteristic, as well as other topological invariants, which are found to behave similarly as func
Publicado em: 2009