Excitations in normal liquid 3He

Pathak, K. N. ; Lücke, M. (1983) Excitations in normal liquid 3He Physical Review B: Condensed Matter and Materials Physics, 28 (5). pp. 2468-2476. ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v28/i5/p2468_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.28.2468


The dynamical density and spin-density response functions are expressed within a dispersion-relation representation in terms of the corresponding static susceptibilities and relaxation kernels. The kernels are approximated by two-mode decay processes. The resulting coupled integral equations are solved to get self-consistent spectral functions of the density and spin-density response. It is found that a density mode can decay into two density modes and two spin-fluctuation excitations whereas a spin-density fluctuation decays only into a density mode and a spin-density excitation. The theory predicts a well-defined zero-sound mode. The calculated excitation spectra of zero sound and spin-fluctuation excitations and their strengths are compared with neutron-scattering results.

Item Type:Article
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ID Code:55969
Deposited On:22 Aug 2011 12:59
Last Modified:22 Aug 2011 12:59

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