Midgap states of La1-xCaxMnO3:: Doping-dependent optical-conductivity studies

被引：124

作者：

Jung, JH ^{[1
]}

Kim, KH

Noh, TW

Choi, EJ

Yu, J

机构：

[1] Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea

[2] Seoul City Univ, Dept Phys, Seoul 130743, South Korea

[3] Sogang Univ, Dept Phys, Seoul 121742, South Korea

[4] LG Corp Inst Technol, Seoul, South Korea

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.57.R11043

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated the optical-conductivity spectra, sigma(omega), of La1-xCaxMnO3 (x=0.0, 0.1, 0.3, 0.5, 0.6, 0.8, 0.9, and 1.0) samples between 5 meV and 30 eV at room temperature. With the hole doping, sigma(omega) showed double-peak midgap structures below 3 eV. The lower frequency peak was assigned to an interatomic Mn3+-->Mn4+ transition and the higher frequency one was attributed to an intra-atomic transition between Jahn-Teller (JT) split Mn3+ levels. This work demonstrated that the local JT effects remained for most samples except CaMnO3.

引用

页码：R11043 / R11046

页数：4

共 19 条

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