Optical selection rules of the magnetic excitation in the S=1/2 one-dimensional Ising-like antiferromagnet BaCo2V2O8
Optical selection rules of the magnetic excitation in the S=1/2 one-dimensional Ising-like antiferromagnet BaCo2V2O8
复制标题
S=1/2一维类伊辛反铁磁体BaCo2V2O8磁激发的光学选择规则
DOI：
10.1103/physrevb.105.014417
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
M. Itoh
中科院分区：
文献类型：
--
作者：
S. Kimura;H. Onishi;A. Okutani;M. Akaki;Y. Narumi;M. Hagiwara;K. Okunishi;K. Kindo;Z. He;T. Taniyama;M. Itoh
在本研究中，我们利用照明极化电磁波的高场电子自旋共振测量，阐明了准一维量子类伊辛反铁磁体从基态到磁激发态的光跃迁选择规律。我们证明了通过在波数=和场致量子临界态产生准粒子对的非常规磁激发可以与振荡磁场和电场耦合。我们的密度矩阵重正化群计算表明，除了自旋和电偶极子之间的磁电耦合外，观察到的选择规则还可以用源于螺旋链结构的两倍和四倍周期自旋相互作用来解释。
In this study, we clarify the selection rules of optical transitions from the ground state to the magnetic excited states in the quasi-one-dimensional quantum Ising-like antiferromagnetwith spinusing the high-field electron spin resonance measurement with illuminating polarized electromagnetic waves. We demonstrate that the unconventional magnetic excitation via the pair creation of quasipaticles at wave numbers=andin the field-induced quantum critical state can couple with both oscillating magnetic and electric fields. Our density matrix renormalization group calculations indicate that the observed selection rules can be explained by two- and four-fold periodical spin interactions, originating from the screw chain structure in, in addition to the magnetoelectric coupling between spins and electric dipoles.