Strong nuclear ring currents and magnetic fields in pseudorotating OsH4 molecule induced by circularly polarized laser pulses
Strong nuclear ring currents and magnetic fields in pseudorotating OsH4 molecule induced by circularly polarized laser pulses
复制标题
圆偏振激光脉冲诱导赝旋转 OsH4 分子中的强核环电流和磁场
DOI：
10.1002/asia.201100776
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
and Joern Manz
中科院分区：
文献类型：
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作者：
Ingo Barch;Christian Bressler;Shiro Koseki;and Joern Manz
我们设计了一个在红外频率和飞秒时间域的圆偏振激光脉冲，用于激发处于三重简并弯曲的第一激发伪旋转态的OsH 4分子。OsH 4分子不需要预先定向。在激发之后，中心核Os围绕平行于激光脉冲的传播方向的轴进行伪旋转。这种伪旋转产生了一个强的环电流，其值为I= 1.53 e fs− 1。环电流半径的平均值很小，R= 0.0031 a0，其中a0是波尔半径。根据毕奥-萨伐尔定律（|\bfB（R= 0）|这种核环电流在分子中诱导出迄今为止预测的最强磁场，其中心峰值绝对值为|\bfB（R= 0）|= 623 T。为了监测效果，我们提出了一个IR泵X射线探针与X射线探针实验，在X射线电离的K和l边缘。结果是基于四面体分子AB 4在圆偏振激光脉冲驱动下的伪旋转激发的一般量子理论。
We design a circularly polarized laser pulse in the infrared frequency and femtosecond time domains, for excitation of the OsH4 molecule in its first excited pseudorotational state of the triply‐degenerate bend. The OsH4 molecule need not be pre‐oriented. After excitation, the central nucleus Os carries out pseudorotation about the axis parallel to the direction of propagation of the laser pulse. This pseudorotation causes a strong electric ring current with a value I= 1.53 e fs− 1. The mean value of the radius of the ring current is very small, R= 0.0031 a0, where a0 is the Bohr radius. According to the Biot–Savart law (| ⃗\bfB (R= 0)|∼ I/R), this nuclear ring current induces the strongest magnetic field predicted so far in molecules, with a central peak absolute value| ⃗\bfB (R= 0)|= 623 T. To monitor the effect, we propose an IR‐pump–X‐ray‐probe versus an X‐ray‐probe‐only experiment, at the K‐and l‐edges of X‐ray ionization. The results are based on the general quantum theory of excitations of pseudorotations in tetrahedral molecules AB4, driven by a circularly polarized laser pulse.