Response of liquid He-3 at finite temperatures

被引:24
作者
Barranco, M
Hernandez, ES
Navarro, J
机构
[1] UNIV BUENOS AIRES,FAC CIENCIAS EXACTAS & NAT,DEPT FIS,RA-1053 BUENOS AIRES,DF,ARGENTINA
[2] CONSEJO NACL INVEST CIENT & TECN,RA-1428 BUENOS AIRES,DF,ARGENTINA
[3] UNIV VALENCIA,CSIC,INST FIS CORPUSCULAR,FAC FIS,E-46100 BURJASSOT,VALENCIA,SPAIN
来源
PHYSICAL REVIEW B | 1996年 / 54卷 / 10期
关键词
D O I
10.1103/PhysRevB.54.7394
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The random-phase-approximation (RPA) dynamical response of liquid He-3 at finite temperatures has been calculated using an effective density-dependent atom-atom interaction. The interaction contains a zero-range part of Skyrme type, supplemented by a weighted density approximation to account for short-range correlations, and a long-range effective interaction of Lennard-Jones type. The calculated zero-sound and paramagnon energy centroids agree reasonably with data, and the calculated strength exhibits a negative energy tail extending up to -0.5 meV, also in good agreement with existing data. We have found that opposite to what happens with zero sound, within RPA the paramagnon peak is rather insensitive to thermal broadening.
引用
收藏
页码:7394 / 7400
页数:7
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