Polar CdSe nanocrystals: Implications for electronic structure

被引:48
作者
Schmidt, ME
Blanton, SA
Hines, MA
GuyotSionnest, P
机构
[1] James Franck Institute, University of Chicago, Chicago, IL 60637
关键词
D O I
10.1063/1.473524
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We report direct spectroscopic evidence for parity-forbidden electronic transitions in CdSe nanocrystals and relate it through perturbation theory to an internal electric field. This field is consistent with an estimated spontaneous polarization of P-s = -0.6 mu C/cm(2) for CdSe. The observed mixing of odd and even band edge hole states by this symmetry breaking internal electric field indicates that current theories of nanocrystal electronic structure, which assume inversion symmetry, require substantial revision. (C) 1997 American Institute of Physics.
引用
收藏
页码:5254 / 5259
页数:6
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