| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Frustrated Ferromagnetic Spin Chain near the Transition Point |
| ZHU Ren-Gui**
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College of Physics and Electronic Information, Anhui Normal University, Wuhu 241000
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ZHU Ren-Gui 2011 Chin. Phys. Lett. 28 097501 |
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Abstract The one-dimensional quantum spin-1/2 model with nearest-neighbor ferromagnetic and next-nearest-neighbor antiferromagnetic interaction is considered. The Hamiltonian is firstly rewritten in a form with rotated spin operators, then bosonized by using the linear spin wave approximation and then treated by using the Green function approach. An integral expression of the quantum correction to the classical ground state energy is derived. The critical behavior of the ground state energy in the vicinity of the transition point from the ferromagnetic to the singlet ground state is analyzed by numerical calculation and the result is −8γ2.
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| Keywords:
75.10.Jm
75.10.Pq
75.10.Hk
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Received: 19 January 2011
Published: 30 August 2011
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| PACS: |
75.10.Jm
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(Quantized spin models, including quantum spin frustration)
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75.10.Pq
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(Spin chain models)
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75.10.Hk
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(Classical spin models)
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