闭笼型纳米球形石墨颗粒的电子性质
Electronic properties of closed cage nanometer-size spherical graphitic particles
摘要：
我们调查的带电粒子的本地化的球形壳，如富勒烯巴基球的像势。这些“球面像态”存在于表面势中，表面势是由吸引像势和角运动产生的排斥向心力之间的竞争形成的。对于纳米管，镜像势具有幂律而不是对数行为，这导致两种几何形状的有效势的形式存在根本差异。球体在其表面附近具有局部稳定状态。在低温下，这导致图像状态的长寿命。我们预测的可能性创建图像状态的结合能的几个meV周围的金属/非金属球壳的光电离。应用和相关现象进行了讨论。
英文摘要：
We investigate the localization of charged particles by the image potential of spherical shells, such as fullerene buckyballs. These "spherical image states" exist within surface potentials formed by the competition between the attractive image potential and the repulsive centripetal force arising from the angular motion. The image potential has a power law rather than a logarithmic behavior for a nanotube, leading to fundamental differences in the forms for the effective potential for the two geometries. The sphere has localized stable states close to its surface. At low temperatures, this results in long lifetimes for the image states. We predict the possibility of creating image states with binding energies of a few meV around metallic/non-metallic spherical shells by photoionization. Applications and related phenomena are discussed.
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