Evidence for light-induced hole polarons in LiNbO3 -: art. no. 067404

被引：56

作者：

Herth, P ^{[1
]}

Granzow, T

Schaniel, D

Woike, T

Imlau, M

Krätzig, E

机构：

[1] Univ Cologne, Inst Mineral, D-50674 Cologne, Germany

[2] Tech Univ Darmstadt, Fachbereich Mat & Geowissensch, D-64287 Darmstadt, Germany

[3] Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.95.067404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Transient light-induced absorption in LiNbO3 is observed in the blue-green spectral range after pulsed illumination with 532 nm. Its buildup and decay in Fe-doped LiNbO3 is satisfactorily described by a sum of two stretched exponential functions. For undoped LiNbO3, however, only one stretched exponential decay is observed. These experimental results are explained by the formation of both small Nb-Li(4+) electron polarons and O- hole polarons. The mechanism is discussed on the basis of a proposed band scheme.

引用

页数：4

共 17 条

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