Local probing of charge and orbital-ordering-induced anisotropy with polarization-modulated infrared reflection difference microspectroscopy

被引：3

作者：

Lee, J. S. ^{[1
]}

Schmidt, M. ^{[2
]}

Schade, U. ^{[1
]}

Cheong, S. -W. ^{[3
]}

Kim, K. H. ^{[4
]}

机构：

[1] Elektronen Speicherring BESSY II, Helmholtz Zentrum Berlin Mat & Energie GmbH, D-12489 Berlin, Germany

[2] Max Planck Inst Colloids & Interfaces, Dept Biomat, D-14424 Potsdam, Germany

[3] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[4] Seoul Natl Univ, Sch Phys & Astron, FPRD, Seoul 151747, South Korea

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 07期

关键词：

bismuth compounds; calcium compounds; charge-ordered states; infrared spectra; light polarisation; reflectivity; LINEAR DICHROISM; MANGANITES; SPINS; HOLES;

D O I：

10.1103/PhysRevB.79.073102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated optical anisotropy of a Bi0.3Ca0.7MnO3+delta crystal induced by charge and orbital orderings using infrared reflection difference microspectroscopy in combination with polarization modulation. Besides a drastic change in the anisotropic response below the charge ordering transition around 16 degrees C, we found an additional change in the optical anisotropy at a slightly lower temperature of around 13 degrees C, which is accompanied by a rotation of the optical axis by 45 degrees. We attribute this intriguing behavior to the signature of the orbital ordering that is not coincident with the charge ordering transition with decrease in temperature.

引用

页数：4