HIGH-ENERGY SPIN-WAVES IN LA2CUO4

被引：182
|
作者：
HAYDEN, SM
AEPPLI, G
OSBORN, R
TAYLOR, AD
PERRING, TG
CHEONG, SW
FISK, Z
机构：
[1] AT&T BELL LABS,MURRAY HILL,NJ 07974
[2] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND
[3] UNIV OXFORD,CLARENDON LAB,OXFORD,ENGLAND
[4] LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545
来源：
PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 25期
关键词：
D O I：
10.1103/PhysRevLett.67.3622
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Time-of-flight spectroscopy using neutrons produced by a spallation source is used to measure the one-magnon scattering throughout the Brillouin zone for La2CuO4. The zone-boundary magnons have an energy HBAR omega(ZB) = 0.312 +/- 0.005 eV and are good eigenstates of the quantum Heisenberg Hamiltonian in that they possess lifetimes > 10/omega. A multiplicative renormalization of the overall frequency scale of classical spin-wave theory accounts for the quantum effects in the one-magnon spectrum.
引用
收藏
页码：3622 / 3625
页数：4
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