Macroscopic Quantum Coherence in an Antiferromagnetic Spin Chain with Biaxial Anisotropy |
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| Authors: | ZHAO Qun-Chao ZHENG Gong-Ping WANG Zheng |
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| Affiliation: | 1.Department of Physics, Henan Normal University, Xinxiang 453007, China;2.Department of Physics and Information Engineering, Shangqiu Normal Univeristy, Shangqiu 476000, China |
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| Abstract: | Instanton configurations of (1+1)-dimensions in an antiferromagnetic biaxial-anisotropy-spin-chain are obtained explicitly in the strong anisotropy limit, which interpolate between degenerate equilibrium orientations of the Néel vector along easy axis and are seen to be responsible for quantum tunneling. Macroscopic quantum coherence of the domain walls is demonstrated in terms of the instantons. |
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| Keywords: | macroscopic quantum coherence antiferromagnetic spin chain |
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