Low-frequency ac electrical resistivity of liquid gallium and its relationship with the dynamic structure factor

Bermejo, F. J.; Barquín, Luis Fernández; Soldevilla, J. García; Plaza, D. Gómez; Gómez-Sal, J.C.

doi:10.1103/physreve.50.1341

Cited by 4 publications

(3 citation statements)

References 23 publications

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“…At any rate, melting of ␣ − Ga is accompanied by an increase in electric resistivity not too dissimilar to others found for alkali-metals, 27 the product of its thermal conductivity times resistivity at melting approaches the expected value for the Lorenz number and, remarkably enough, the volume coefficient of the electrical resistivity at melting, a property that explores changes in size of the Fermi sphere upon compression, locates molten Ga very close to semimetallic Bi and away from the alkali-metals.…”

Section: -7supporting

confidence: 58%

Experimental evidence for the presence of nonacoustic excitations in molten Ga

et al. 2005

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The nature of the broad band of microscopic excitations measured in molten gallium is investigated by means of analysis of their mode eigenvectors I͑Q , ͒. The results, derived from neutron spectroscopy experiments, show that excitations with a dominant acoustic character are confined to low energy transfers. In contrast, those appearing at higher frequencies unmistakably exhibit optical character, as evidenced by the out-of-phase relationship shown by the phase of oscillations in I͑Q , ͒ that become significantly shifted relative to those of the static structure factor. Such effects are shown to arise from partial covalency that is already known to be present in gaseous, cluster and crystalline forms.

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Section: -7supporting

confidence: 58%

Experimental evidence for the presence of nonacoustic excitations in molten Ga

et al. 2005

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“…4, the propagation velocity changes from a value of 1680 ± 80 m/s to 2005 ± 120 m/s, i.e., it has an increasing of $20%. This so-called positive dispersion was already found earlier in liquid polyvalent metals [3,4], as well as in alkali metals. This effect can be described within the framework of extended hydrodynamics [16], where it is shown that frequency dependent upper and lower limits exist for the propagation speed of longitudinal collective modes.…”

Section: Resultsmentioning

confidence: 72%

“…The effects of the long-range behavior of the pair potential are still not well understood. However, it has been recently shown that strongly charged ions metals, characterized by a pair potential attractive well beyond the first-neighbor distance, sustain long living density fluctuations modes [3,4].…”

Section: Introductionmentioning

confidence: 99%