Quantum phase transitions in a new exactly solvable quantum spin biaxial model with multiple spin interactions

Details Quantum phase transitions in a new exactly solvable quantum spin biaxial model with multiple spin interactions Quantum phase transitions in a new exactly solvable quantum spin biaxial model with multiple spin interactions

2010-07-13

arxiv.org/abs/1007.2045v1

Phys. Rev. B 80, 014414 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

The new integrable quantum spin model is proposed. The model has a biaxial magnetic anisotropy of alternating coupling between spins together with multiple spin interactions. Our model gives the possibility to exactly find thermodynamic characteristics of the considered spin chain. The ground state of the model can reveal spontaneous values of the total magnetic and antiferromagnetic moments, caused by multiple spin couplings. Also, in the ground state, depending on the strength of multiple spin couplings, our model manifests several quantum critical points, some of which are governed by the external magnetic field.

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