Lattice effects on charge localization in cuprates

被引：19
作者：
Egami, T
Petrov, Y
Louca, D
机构：
[1] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA
[2] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
[3] Univ Virginia, Dept Phys, Charlottesville, VA 22903 USA
来源：
JOURNAL OF SUPERCONDUCTIVITY | 2000年 / 13卷 / 05期
基金：
美国国家科学基金会;
关键词：
neutron scattering; phonons; polarons; cuprates; CMR manganites;
D O I：
10.1023/A:1007849811903
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Recent experimental results on cuprates and manganites, including those of elastic and inelastic neutron scattering measurements, suggest that charges are not homogeneously distributed even in the metallic state in these compounds. Charge inhomogeneity results from spin/lattice charge constriction. In cuprates the LO phonons strongly reflect the temperature- and composition-dependent charge inhomogeneity and may possibly be involved in causing it. Unlike the static stripes that compete against superconductivity, the charge inhomogeneity seen by the LO phonons is markedly increased in the superconducting phase. A new mechanism of high-temperature superconductivity involving lattice/spin charge constriction is proposed.
引用
收藏
页码：709 / 712
页数：4
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