Dynamic structure factors and neutron scattering spectra of liquid<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">−</mml:mi></mml:mrow><mml:mrow /><mml:mrow><mml:mn>4</mml:mn></mml:mrow><mml:mrow /><mml:mrow /><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>He mixtures

Szprynger, A.; Lücke, M.

doi:10.1103/physrevb.32.4442

Cited by 7 publications

(1 citation statement)

References 20 publications

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“…8 ͑using a matrix dispersion-relation representation͒, in Ref. 9 within a correlated random phase approximation ͑very similar, in spirit, to the phenomenological polarization potential method used in Ref.…”

Section: Introductionmentioning

confidence: 99%

Microscopic approach to the response of−43He mixtures

et al. 1996

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Correlated-basis-function perturbation theory is used to evaluate the zero-temperature response S(q,) of 3 He mixtures for inelastic neutron scattering, at momentum transfers q ranging from 1.1 to 1.8 Å Ϫ1 . We adopt a Jastrow correlated ground state and a basis of correlated particle-hole and phonon states. We insert correlated one-particle-one-hole and one-and two-phonon states to compute the second-order response. The decay of the one-phonon states into two-phonon states is accounted for in the boson-boson approximation. The full response is split into three partial components S ␣␤ (q,), each of them showing a particle-hole bump and a one phonon, ␦-shaped peak, which stays separated from the multiphonon background. The cross term S 34 (q,) results to be of comparable importance to S 33 (q,) in the particle-hole sector and to S 44 (q,) in the phonon one. Once the response has been convoluted with the experimental broadening, the computed scattering function is in semiquantitative agreement with recent experimental measurements.

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Section: Introductionmentioning

confidence: 99%

Microscopic approach to the response of−43He mixtures

et al. 1996

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Model two-dimensional liquid 3He–4He mixture within the self-consistent field approximation

Al-Hayek

Tanatar

1999

Physica B: Condensed Matter

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In this paper we use the self-consistent scheme proposed by Singwi, Tosi, Land and SjoK lander (STLS) to study a model two-component fermion}boson system (He}He mixture) in two dimensions. We calculate the partial static structure factors and e!ective potentials, given a model bare interaction with hard-core plus an attractive tail. We study the dependence of these quantities on the He fraction in the mixture. Collective modes for the mixture are also discussed.

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