Effect of nonadiabaticity and disorder on nonlinear optical susceptibilities

被引：3
|
作者：
Wang, WZ [1 ]
Shuai, Z
Saxena, A
Bishop, AR
Brédas, JL
机构：
[1] Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
[2] Univ Mons, Ctr Rech Elect & Photon Mol, Serv Chim Mat Nouveaux, B-7000 Mons, Belgium
来源：
PHYSICAL REVIEW B | 1999年 / 59卷 / 03期
关键词：
D O I：
10.1103/PhysRevB.59.1697
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of nonadiabaticity on optical linear polarizability (alpha) and third-order polarizability (gamma) is investigated numerically for a Holstein-Hubbard finite chain system. The variations of alpha and gamma are studied as a function of the nonadiabaticity parameter, electron-phonon coupling strength and electron-electron interactions. For a specific range of values of each of these parameters, alpha and gamma are significantly enhanced. Disorder in either electronic or phonon degrees of freedom is also found to enhance optical nonlinearity. [S0163-1829(99)01403-4].
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页码：1697 / 1700
页数：4
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