Pressure-induced structural change of liquid<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>CdTe</mml:mi></mml:mrow></mml:math>up to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>23.5</mml:mn><mml:mspace width="0.3em" /><mml:mi>GPa</mml:mi></mml:mrow></mml:math>

Hattori, Takanori; Kinoshita, Toshihiro; Narushima, Tetsuya; Tsuji, Kazuhiko; Katayama, Yoshinori

doi:10.1103/physrevb.73.054203

Cited by 23 publications

(23 citation statements)

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“…In recent years, phase transformations have been found [47,[134][135][136][137][138][139][140][141][142][143][144][145][146][147][148][149][150] in several different types of liquids, including in elementary liquids (e.g., P [134,137,138,149], Se [134,136,139,140], S [134,136], Bi [134,136], Te [134,136] Moreover, multiple pressure-induced phase transitions may take place in one system: for example, AsS undergoes the transformation between the molecular and covalent liquid, followed by the transformation to the metallic phase [47]. The transformations take place in the narrow pressure range and with large changes of structure and major properties such as viscosity.…”

Section: Phase Transitions In Liquidsmentioning

confidence: 99%

Collective modes and thermodynamics of the liquid state

2015

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Strongly interacting, dynamically disordered and with no small parameter, liquids took a theoretical status between gases and solids, with the historical tradition of hydrodynamic description as the starting point. We review different approaches to liquids as well as recent experimental and theoretical work, and propose that liquids do not need classifying in terms of their proximity to gases and solids or any categorizing for that matter. Instead, they are a unique system in their own class with a notably mixed dynamical state in contrast to pure dynamical states of solids and gases. We start with explaining how the first-principles approach to liquids is an intractable, exponentially complex problem of coupled non-linear oscillators with bifurcations. This is followed by a reduction of the problem based on liquid relaxation time τ representing non-perturbative treatment of strong interactions. On the basis of τ , solid-like high-frequency modes are predicted and we review related recent experiments. We demonstrate how the propagation of these modes can be derived by generalizing either hydrodynamic or elasticity equations. We comment on the historical trend to approach liquids using hydrodynamics and compare it to an alternative solid-like approach. We subsequently discuss how collective modes evolve with temperature and how this evolution affects liquid energy and heat capacity as well as other properties such as fast sound. Here, our emphasis is on understanding experimental data in real, rather than model, liquids. Highlighting the dominant role of solid-like high-frequency modes for liquid energy and heat capacity, we review a wide range of liquids: subcritical low-viscous liquids, supercritical state with two different dynamical and thermodynamic regimes separated by the Frenkel line, highly-viscous liquids in the glass transformation range and liquid-glass transition. We subsequently discuss the fairly recent area of liquid-liquid phase transitions, the area where the solid-like properties of liquids have become further apparent. We then discuss gas-like and solid-like approaches to quantum liquids and theoretical issues that are similar to the classical case. Finally, we summarize the emergent view of liquids as a unique system in a mixed dynamical state, and list several areas where interesting insights may appear and continue the extraordinary liquid story.

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Section: Phase Transitions In Liquidsmentioning

confidence: 99%

Collective modes and thermodynamics of the liquid state

2015

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“…This is consistent with the large difference of the potential and Coulombic energies. One can find some experimentally obtained g(r)'s under high-pressure conditions in heterogeneous liquids under high pressure (∼GPa) 41 or in ionic liquids under moderate pressures 42 (∼MPa).…”

Section: Iiib Comparison Between Correspondingmentioning

confidence: 99%

Molecular Dynamics Study of Thermodynamic Scaling of the Glass-Transition Dynamics in Ionic Liquids over Wide Temperature and Pressure Ranges

2010

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Experimentally, superpositioning of dynamic properties such as viscosity, relaxation times, or diffusion coefficients under different conditions of temperature T, pressure P, and volume V by the scaling variable TV γ (where γ is a material constant) has been reported as a general feature of many kinds of glass-forming materials. In the present work, molecular dynamics (MD) simulations have been performed to study the scaling of dynamics near the glass-transition regime of ionic liquids. Scaling in the simulated 1-ethyl-3-methylimidazolium nitrate (EMIM-NO 3 ) system has been tested over wide ranges of temperatures and pressures. TV γ scaling of the dynamics is well described by master curves with γ ) 4.0 ( 0.2 and 3.8 ( 0.2 for cation and anion, respectively. Structures and Coulombic terms of the corresponding states are found to be quite similar. The temperature and pressure dependence of the pair correlation function show similar trends and therefore can be superpositioned onto the master curve. Although the behaviors with γ ) 4 might be expected from the relation, γ ) n/3, for the dynamics with the soft-core-type potential U ) ε(σ/r) n , with n ) 12, pair potentials used in the MD simulation have a more complex form, and not all the repulsive terms can play their roles in the heterogeneous structures determined by ion-ion interactions. Scaling is related to the common part of effective potentials related to the pair correlation functions, including the many-body effect in real space.

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“…Essentially, the static structure factor represents a measure for the number of scattered particles by the unit of time in a given angle, and therefore can be related with quantities that can be obtained experimentally in semiconductors, e.g., the optical absorption and inelastic scattering with light or with low-energy electrons. In recent times, experimental investigations in different many-body systems have allowed the comparison between experimental results and theoretical calculation results for the static structure factor [20][21][22]. As an example, for dense plasma in an aluminum foil the experimental results show the importance of the screening effects on the static structure factor [20], but in this case the frequency range is six orders of magnitude larger than that for semiconductors.…”

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Correlation effects for a quasi‐one‐dimensional polaron gas

Machado

Borges

Osório

2010

Physica Status Solidi (b)

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, Phone: þ55 62 3209 6400, Fax: þ55 62 3521 1806, Web: www.eee.ufg.brIn this work, we investigate the plasmon-LO phonon interaction effects on the intrasubband structure factor, electron-electron effective potential, and plasmon energy associated with the lowest subband in a GaAs-AlGaAs rectangular quantum-well wire (QWW) as a function of the electronic density. Our calculations are performed using the self-consistent field approximation, which includes the localfield correction (LFC) within the Singwi, Tosi, Land, and Sjolander (STLS) theory, at zero temperature and assuming a three-subband model, where only the first subband is occupied by electrons. We report for the first time dips in the structure factor spectra as a function of the quasi-one-dimensional (Q1D) plasmon-LO phonon wavevector that are directly related with the resonant split of the collective excitation energy into two branches due to the polaronic effects.

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Pressure-induced structural change of liquidCdTeup to23.5GPa

Cited by 23 publications

References 50 publications

Collective modes and thermodynamics of the liquid state

Collective modes and thermodynamics of the liquid state

Molecular Dynamics Study of Thermodynamic Scaling of the Glass-Transition Dynamics in Ionic Liquids over Wide Temperature and Pressure Ranges

Correlation effects for a quasi‐one‐dimensional polaron gas

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