Magnetic excitations of the doped-hole state in diamagnetic La2Cu0.5Li0.5O4

被引：28

作者：

Yoshinari, Y

Hammel, PC

Martindale, JA

Moshopoulou, E

Thompson, JD

Sarrao, JL

Fisk, Z

机构：

[1] NATL HIGH MAGNET FIELD LAB,TALLAHASSEE,FL 32306

[2] FLORIDA STATE UNIV,TALLAHASSEE,FL 32306

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.77.2069

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Substitution of Li for Cu in La2Cu1-xLixO4 donates holes; at x = 0.5 the Li ions form an ordered superlattice which isolates individual CuO4 plaquettes from one another, and the number of doped holes is sufficient that each plaquette is occupied. Above 170 K, an activated temperature dependence of the Cu nuclear spin relaxation rate reveals a magnetic excitation of the doped-hole state with an energy of similar to 130 meV. Below 170 K relaxation is primarily due to fluctuations of the electric field gradient; the temperature dependence of this rate is anomalously slow: T-1(-1) proportional to root T.

引用

页码：2069 / 2072

页数：4

共 20 条

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ABRAGAM A, 1961, PRINCIPLES NUCLEAR M, pCH8

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