Lattice dynamics of argon at 4 degrees K

Batchelder, D. N.; Collins, M. F.; Haywood, B. C.; Sidey, G R

doi:10.1088/0022-3719/3/2/008

Cited by 71 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These interatomic potentials produce a cubic lattice parameter of 5.313 Å at 0 K, compared with 5.311 Å extrapolated for Ar from experimental data. 32 The potentials produce phonon dispersions in good agreement with neutron scattering measurements in solid Ar, 33 as shown in Fig. 5.…”

supporting

confidence: 76%

Effects of bulk and interfacial anharmonicity on thermal conductance at solid/solid interfaces

Polanco

Rastgarkafshgarkolaei

et al. 2017

Phys. Rev. B

View full text Add to dashboard Cite

We present the results of classical molecular dynamics simulations to assess the relative contributions to interfacial thermal conductance from inelastic phonon processes at the interface and in the adjacent bulk materials. The simulated system is the prototypical interface between argon and "heavy argon" crystals, which enables comparison with many past computational studies. We run simulations interchanging the Lennard-Jones potential with its harmonic approximation to test the effect of anharmonicity on conductance.The results confirm that the presence of anharmonicity is correlated with increasing thermal conductance with temperature, which supports conclusions from prior experimental and theoretical work. However, in the model Ar/heavy-Ar system, anharmonic effects at the interface itself contribute a surprisingly small part of the total thermal conductance. The larger fraction of the thermal conductance at high temperatures arises from anharmonic effects away from the interface. These observations are supported by comparisons of the spectral energy density, which suggest that bulk anharmonic processes increase interfacial conductance by thermalizing energy from modes with low transmission to modes with high transmission.

show abstract

supporting

confidence: 76%

Effects of bulk and interfacial anharmonicity on thermal conductance at solid/solid interfaces

Polanco

Rastgarkafshgarkolaei

et al. 2017

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…4, the P(V) curves calculated with the two pair potentials are compared to the x-ray data. 17 The calculation with the HFDID1 potential is in very good agreement with experiment below 10 GPa but exponentially diverges above as expected due to the increasing importance of many-body 20 are reported in Fig. 5.…”

Section: A the Pair Potential Approachsupporting

confidence: 75%

Phonon dispersion curves in an argon single crystal at high pressure by inelastic x-ray scattering

et al. 2001

View full text Add to dashboard Cite

The phonon dispersion of fcc argon under high pressure to 20 GPa has been measured along the ͑100͒ direction by inelastic x-ray scattering. First, this shows a novel possibility to investigate the single crystal dynamical properties under very high pressure in a diamond anvil cell. Second, the comparison between experiment and phonon calculations, using pair potentials ͑either the pure two-body potential or an effective pair potential͒ and a Slater-Kirkwood form for the three-body interaction, clearly demonstrates that phonon energies can be strongly influenced under high pressure by the nonadditive part of the interaction.

show abstract

“…Some measurements for phonon dispersion curves of argon a t 4 K were also made by Batchelder et al [20]. Their results showed a close fit with those of Egger et al [19] after correction for isotopic mass.…”

Section: Argonmentioning

confidence: 54%