Charge carrier dynamics in semiconducting mercury cluster anions

被引：9
|
作者：
Young, Ryan M. [1 ]
Griffin, Graham B. [1 ]
Ehrler, Oli T. [1 ]
Kammrath, Aster [1 ,2 ]
Bragg, Arthur E. [1 ,3 ]
Verlet, Jan R. R. [1 ,4 ]
Cheshnovsky, Ori [5 ]
Neumark, Daniel M. [1 ,3 ,6 ]
机构：
[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
[2] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA
[3] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA
[4] Univ Durham, Dept Chem, Durham DH1 3LE, England
[5] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Chem, IL-69978 Tel Aviv, Israel
[6] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA
来源：
PHYSICA SCRIPTA | 2009年 / 80卷 / 04期
关键词：
QUANTUM DOTS; PHOTOELECTRON; TRANSITION; ELECTRONS; RELAXATION; EXCITATION; STATES;
D O I：
10.1088/0031-8949/80/04/048102
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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 similar to 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 similar to 500 fs timescale and are attributed to either a hole-induced contraction of the cluster or electron-electron scattering.
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页数：7
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