Electronic structures of layered perovskite Sr2MO4 (M=Ru, Rh, and Ir)

被引：98

作者：

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

Kim, M. W.

Kim, K. W.

Lee, Y. S.

Kim, J. -Y.

Park, J. -H.

Kim, B. J.

Oh, S. -J.

Nakatsuji, S.

Maeno, Y.

Nagai, I.

Ikeda, S. I.

Cao, G.

Noh, T. W.

机构：

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

[2] Soongsil Univ, Dept Phys, Seoul 156743, South Korea

[3] Pohang Accelerator Lab, Pohang 790784, South Korea

[4] Pohang Inst Sci & Technol, Dept Phys, Pohang 790784, South Korea

[5] Elect Spin Sci Ctr, Pohang 790784, South Korea

[6] Seoul Natl Univ, CSCMR, Sch Phys & Astron, Seoul 151747, South Korea

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

[8] Kyoto Univ, Dept Phys, Kyoto 6068501, Japan

[9] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan

[10] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.74.113104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated the electronic structures of the two-dimensional layered perovskite Sr2MO4 (M=4d Ru, 4d Rh, and 5d Ir) using optical spectroscopy and polarization-dependent O 1s x-ray absorption spectroscopy. While the ground states of the series of compounds are rather different, their optical conductivity spectra sigma(omega) exhibit similar interband transitions, indicative of the common electronic structures of the 4d and 5d layered oxides. The energy splittings between the two e(g) orbitals, i.e., d(3z2-r2) and d(x2-y2), are about 2 eV, which is much larger than those in the pseudocubic and 3d layered perovskite oxides. The electronic properties of the Sr2MO4 compounds are discussed in terms of the crystal structure and the extended character of the 4d and 5d orbitals.

引用

页数：4