Charge carrier dynamics in semiconducting mercury cluster anions

Charge carrier dynamics in semiconducting mercury cluster anions
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半导体汞团簇阴离子中的载流子动力学

DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
D. Neumark
D. Neumark
中科院分区：
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文献类型：
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作者：
Ryan M. Young;G. Griffin;Oli T. Ehrler;A. Kammrath;A. Bragg;J. Verlet;O. Cheshnovsky;D. Neumark

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We have examined size-dependent electronic relaxation dynamics in isolated semiconducting mercury cluster anions using time-resolved photoelectron imaging. Relaxation following excitation from within the conduction (p-) band occurs on an ∼3–40 ps timescale and is attributed to non-adiabatic relaxation through the p-band. Exciting an electron from the valence (s-) band into the conduction band creates an electron–hole pair that relaxes prior to Auger emission. The dynamics associated with this feature occur on an ∼500 fs timescale and are attributed to either a hole-induced contraction of the cluster or electron–electron scattering.