Elastic properties of crystalline and liquid gallium at high pressures

Lyapin, A. G.; Gromnitskaya, E. L.; Yagafarov, O. F.; Stal’gorova, O. V.; Brazhkin, V. V.

doi:10.1134/s1063776108110125

Cited by 34 publications

(35 citation statements)

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“…3,[11][12][13][14][15][16] The microstructure and compressibility of gallium melt has some similarity to high-pressure phases, therefore liquid-liquid transition in Ga melt under high P-T conditions has been suggested. 2,[17][18][19] There are a number of studies of liquid gallium under high pressure conditions, however, some fundamental properties such as the equation of state (EoS) of liquid Ga under extreme conditions remain unclear. Very recently, the advanced pair distribution function (PDF) method in which synchrotron high-energy x-ray total scattering data, combined with reverse Monte Carlo simulation, was used to study the microstructure and EoS of liquid gallium under high pressure conditions.…”

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confidence: 99%

Study of liquid gallium as a function of pressure and temperature using synchrotron x-ray microtomography and x-ray diffraction

et al. 2014

Applied Physics Letters

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confidence: 99%

Study of liquid gallium as a function of pressure and temperature using synchrotron x-ray microtomography and x-ray diffraction

et al. 2014

Applied Physics Letters

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“…The C S /T and C N /T data were corrected by taking into account the pressure induced molar volume change, which is associated with the Ga-I to Ga-II structural phase transition. 52,53 Note that without such correction the value of the electronic specific heat γ e , as is reported in Ref. 48, is underestimated.…”

mentioning

confidence: 81%

“…The CS/T and CN/T data from Ref 48. were corrected for the pressure induced molar volume change, which is associated with the Ga-I to Ga-II structural phase transition 52,53. Blue lines are fits of the α−model (see text for details).…”

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confidence: 99%

Structural phases of elemental Ga: Universal relations in conventional superconductors

et al. 2020

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The temperature dependent measurements of the thermodynamic critical field and the specific heat for the pressure stabilized Ga-II phase of elemental Gallium are presented. The discussion of these and other Ga phases data in the context of elemental and binary phonon-mediated type-I superconductors allowed to establish simple scaling relations between BCS quantities such as Bc(0)/Tc √ γe and the specific heat jump at Tc versus the coupling strength 2∆/kBTc [∆ and Bc(0) are the zerotemperature values of the superconducting energy gap and the thermodynamic critical field, respectively, Tc is the transition temperature, and γe is the electronic specific heat]. The scaling relations can be analytically expressed by taking into account strong-coupling corrections to BCS theory. Such correlations can naturally explain the linear relation between Bc(0) and Tc, which holds for type-I superconducting materials.

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“…Corrections for the chamber deformation with the pressure and temperature variations were determined in separate experiments. This method of ultrasonic measurement of liquids with the high-pressure piezometer was previously developed for liquid methanol 47 and gallium 48,49 , using original copper-teflon capsules. The stability of these capsules against the liquid leakage restricted the maximum attainable pressure for measurements by the value about 1 GPa.…”

Section: Methodsmentioning

confidence: 99%

Dielectric spectroscopy and ultrasonic study of propylene carbonate under ultra-high pressures

Kondrin

Gromnitskaya²,

Pronin³

et al. 2012

The Journal of Chemical Physics

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We present the high pressure dielectric spectroscopy (up to 4.2 GPa) and ultrasonic study (up to 1.7 GPa) of liquid and glassy propylene carbonate (PC). Both of the methods provide complementary pictures of the glass transition in PC under pressure. No other relaxation processes except α-relaxation have been found in the studied pressure interval. The propylene carbonate liquid is a glassformer where simple relaxation and the absence of β-relaxation are registered in the record-breaking ranges of pressures and densities. The equation of state of liquid PC was extended up to 1 GPa from ultrasonic measurements of bulk modulus and is in good accordance with the previous equations developed from volumetric data. We measured the bulk and shear moduli and Poisson's ratio of glassy PC up to 1.7 GPa. Many relaxation and elastic properties of PC can be qualitatively described by the soft-sphere or Lennard-Jones model. However, for the quantitative description of entire set of the experimental data, these models are insufficient. Moreover, the Poisson coefficient value for glassy PC indicates a significant contribution of non-central forces to the intermolecular potential. The well-known correlation between Poisson's ratio and fragility index (obtained from dielectric relaxation) is confirmed for PC at ambient pressure, but it is violated with pressure increase. This indicates that different features of the potential energy landscape are responsible for the evolution of dielectric response and elasticity with pressure increase.

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Elastic properties of crystalline and liquid gallium at high pressures

Cited by 34 publications

References 38 publications

Study of liquid gallium as a function of pressure and temperature using synchrotron x-ray microtomography and x-ray diffraction

Study of liquid gallium as a function of pressure and temperature using synchrotron x-ray microtomography and x-ray diffraction

Structural phases of elemental Ga: Universal relations in conventional superconductors

Dielectric spectroscopy and ultrasonic study of propylene carbonate under ultra-high pressures

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