Anomalous dispersion of LO phonons in La1.85Sr0.15CuO4 at low temperatures

被引：374

作者：

McQueeney, RJ

Petrov, Y

Egami, T

Yethiraj, M

Shirane, G

Endoh, Y

机构：

[1] Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

[3] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

[4] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[5] Brookhaven Natl Lab, Upton, NY 11973 USA

[6] Tohoku Univ, Dept Phys, Sendai, Miyagi 980, Japan

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.82.628

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Inelastic neutron scattering measurements of La1.85Sr0.15CuO4 show that a discontinuity in dispersion develops in the middle of the highest energy LO phonon branch at low temperatures. The result suggests dynamic short range unit cell doubling in the CuO2 plane along the direction of the Cu-O bond, such as charge ordering on every other row of oxygen. Such charge ordering is related to, but is different from, the stripe charge ordering observed for nonsuperconducting cuprates. [S0031-9007(98)08166-6].

引用

页码：628 / 631

页数：4

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