Momentum-resolved charge excitations in a prototype one-dimensional Mott insulator

被引：76

作者：

Hasan, MZ ^{[1
]}

Montano, PA

Isaacs, ED

Shen, ZX

Eisaki, H

Sinha, SK

Islam, Z

Motoyama, N

Uchida, S

机构：

[1] Princeton Univ, Dept Phys, Princeton, NJ USA

[2] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA

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

[4] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[5] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[6] Natl Inst Adv Ind Sci & Technol, Nanoelect Res Inst, Tsukuba, Ibaraki 3058568, Japan

[7] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60115 USA

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

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.88.177403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report momentum-resolved charge excitations in a one-dimensional (1D) Mott insulator studied using high resolution inelastic x-ray scattering over the entire Brillouin zone for the first time. Excitations at the insulating gap edge are found to be highly dispersive (momentum dependent) compared to excitations observed in two-dimensional Mott insulators. The observed dispersion in 1D cuprates (SrCuO2 and Sr2CuO3) is consistent with charge excitations involving holons which is unique to spin-1/2 quantum chain systems. These results point to the potential utility of momentum-resolved inelastic x-ray scattering in providing valuable information about electronic structure of strongly correlated insulators.

引用

页码：1774031 / 1774034

页数：4

共 32 条

[1] Resonant inelastic x-ray scattering from valence excitations in insulating copper oxides [J].