Spin-Flip of Polaron in Polymers with a Magnetic Impurity
Spin-Flip of Polaron in Polymers with a Magnetic Impurity
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DOI：
10.1088/0256-307x/24/6/071
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发表时间：
2007-06
影响因子：
3.5
通讯作者：
Chen Mei-juan;Yany Yong-hong;Wu Chang-qin
中科院分区：
文献类型：
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作者：
Chen Mei-juan;Yany Yong-hong;Wu Chang-qin
利用非绝热演化方法研究了含磁性杂质聚合物中极化子的自旋翻转过程。结果表明，当杂质的自旋取向固定为垂直于极化子（？）= ?/ 2），磁性杂质引起自旋翻转过程。自旋翻转的概率随着交换积分J的增加而增加，直到约0.35？eV，然后随着J的增加而减小。在J是固定的，而自旋取向是可调的情况下，我们发现自旋翻转的概率随杂质取向而变化，并达到最大值在？= ?/ 2.
Using a nonadiabatic evolution method, we investigate the spin-flip process of polaron in polymers with a magnetic impurity. Our results show that when the spin orientation of this impurity is fixed to be perpendicular to the spin of polaron (? = ?/2), the magnetic impurity causes a spin-flip process. The probability of the spin-flip increases with the increase of exchange integral J up to about 0.35?eV and then decreases with the increase of J. In the case J is fixed while the spin orientation is adjustable, we find the probability of the spin-flip varies with the impurity orientation and reaches a maximum value at ? = ?/2.