Particle-hole pair excitations in a quasi-zero-dimensional Mott insulator

被引：1

作者：

Hasan, MZ ^{[1
]}

Li, Y

Chuang, YD

Montano, PA

Hussain, Z

Eisaki, H

Motoyama, N

Uchida, S

机构：

[1] Princeton Univ, Joseph Henry Labs, Dept Phys, Princeton, NJ 08544 USA

[2] Princeton Mat Inst, Princeton Ctr Complex Mat Res, Princeton, NJ 08544 USA

[3] Univ Illinois, Dept Phys, Chicago, IL 60607 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] Natl Ctr Adv Ind Sci & Tech, Nanoelectr Res Ctr, Tsukuba, Ibaraki 3058568, Japan

[6] Univ Tokyo, Dept Superconduct, Bunkyo Ku, Tokyo 113, Japan

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2003年 / 17卷 / 18-20期

关键词：

resonant; inelastic X-ray scattering; correlated electrons; Mott insulators;

D O I：

10.1142/S0217979203021319

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate momentum dependence of charge excitations across the effective Mott gap in a quasi-zero dimensional (q-ZD) model cuprate Li2CuO2, using high resolution inelastic X-ray scattering by working near a resonance. In comparison to quasi-one dimensional (q-1D) systems such as Sr2CuO3 or SrCuO2, momentum dependence is much weaker in Li2CuO2. Particle-hole pair excitations at the gap edge in these low dimensional Mott systems are found to be strongly dependent on the effective dimensionality (or topology) of the lattice and the strength of electron-electron interaction.

引用

页码：3513 / 3518

页数：6

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