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Orbiting Orbitals: Visualization of Vibronic Motion at a Conical Intersection

机译:绕轨道运动:锥形相交处的振动运动的可视化

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The Jahn?Teller (JT) active unpaired electron of single metalloporphyrin radical anions is imaged through scanning tunneling microscopy. It is demonstrated that the electron is delocalized over the porphyrin macrocycle and its topographic image is determined by vibronic motion: the orbital of the electron adiabatically follows the zero-point pseudorotation of skeletal deformations. Transformation of the polar graphs of the observed images allows visualization of the adiabatic vibrational density to which the electron is coupled. The vibronic potential at the conical intersection is visualized and the half-integer angular momentum characteristic of the Berry phase is revealed in the radial function of the electron. The measurements underscore the economy of Jahn?Teller dynamics: small atomic displacements (~10~(?1) ?) determined by weak interactions (~10 meV) control the motion of the electron on a 10 ? scale and determine the molecular shape and function.
机译:通过扫描隧道显微镜对单个金属卟啉自由基阴离子的Jahn?Teller(JT)活性不成对电子成像。结果表明,电子在卟啉大环上是离域的,其形貌图像由振动运动确定:电子的轨道绝热地跟随骨骼变形的零点伪旋转。观察图像的极坐标图的变换允许可视化电子耦合到的绝热振动密度。可以看到圆锥形相交处的振动势,并且在电子的径向函数中可以看到贝里相的半整数角动量特性。这些测量结果强调了Jahn?Teller动力学的经济性:弱相互作用(〜10 meV)决定的小原子位移(〜10〜(?1)?)控制着电子在10?上的运动。缩放并确定分子的形状和功能。

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