MID-GAP STATES IN BABIO3 - A PHOTOINDUCED REFLECTANCE STUDY

被引：3

作者：

MARKOWITSCH, W

SCHLOSSER, V

LANG, W

REMSCHNIG, K

ROGL, P

机构：

[1] LUDWIG BOLTZMANN INST FESTKORPEPHYS,A-1060 VIENNA,AUSTRIA

[2] UNIV VIENNA,INST PHYS CHEM,A-1010 VIENNA,AUSTRIA

来源：

PHYSICA C | 1991年 / 185卷

关键词：

D O I：

10.1016/0921-4534(91)91721-F

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Photo-induced reflectance measurements of BaBiO3 are reported. Utilizing a double modulation technique, several reflectivity peaks around the midgap energy (approximately 0.9 eV) are observed when exciting the system at a photon energy of 1.95 eV. This is evidence for a lattice relaxation after removing electrons from the valence band. As a consequence energy levels appear within the gap. The results confirm that the gap in BaBiO3 originates from a Peierls distortion (charge density wave).

引用

页码：995 / 996

页数：2

共 3 条

[1] PHOTOEXCITATIONS IN TRANS-(CH)X - A FOURIER-TRANSFORM INFRARED STUDY [J].