Response of liquid He-3 at finite temperatures

Article

关键词: DENSITY-FUNCTIONAL-APPROACH;    ELEMENTARY EXCITATIONS;    CLUSTERS;    SYSTEMS;    RANGE;    SPIN;   

DOI  :  10.1103/PhysRevB.54.7394

来源: SCIE

【 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.

【 授权许可】

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