自旋1/2海森堡反铁磁链中电子自旋共振（ESR）位移的精确分析
Exact analysis of ESR shift in the spin-1/2 Heisenberg antiferromagnetic chain.
作者信息
Maeda Yoshitaka, Sakai Kazumitsu, Oshikawa Masaki
机构信息
Department of Physics, Tokyo Institute of Technology, Oh-okayama, Meguro-ku, Tokyo 152-8551, Japan.
出版信息
Phys Rev Lett. 2005 Jul 15;95(3):037602. doi: 10.1103/PhysRevLett.95.037602. Epub 2005 Jul 13.
A systematic perturbation theory is developed for the ESR shift and is applied to the spin-1/2 Heisenberg antiferromagnetic chain with a general anisotropic exchange interaction. Using the Bethe ansatz technique, the resonance shift is obtained exactly for the whole range of temperature and magnetic field in the first order of the anisotropy. The obtained g shift strongly depends on magnetic fields at low temperature, showing a significant deviation from the previous classical result.
针对电子自旋共振（ESR）位移发展了一种系统的微扰理论，并将其应用于具有一般各向异性交换相互作用的自旋-1/2海森堡反铁磁链。利用贝塞耳假设技术，在各向异性的一阶近似下，精确得到了整个温度和磁场范围内的共振位移。所得到的g位移在低温下强烈依赖于磁场，与先前的经典结果有显著偏差。
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