Exact Dynamically Convergent Calculations of the Frequency-Dependent Density Response Function

Jiao, Hong; Mh, Lee

doi:10.1103/physrevlett.55.2375

Cited by 62 publications

(21 citation statements)

References 25 publications

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“…Dynamic local field corrections for the OCP As already mentioned, there are several approximative approaches to the dynamic structure factor of the electron gas. Here, we use the approach of Dabrowski [26] and the approach of Hong and Lee [27]. Both approaches are interpolation schemes incorporating sum rules and other exact properties.…”

Section: Local Field Corrections For An Interacting Electron Gasmentioning

confidence: 99%

“…The corresponding real part is then obtained by a Kramers-Kronig relation, where P indicates Cauchy principal value integration. As a second option for the dynamic local field correction of the OCP we introduce the above mentioned approach of Hong and Lee [27,29], which is based on the recurrence relation technique. Specifically, we use the lowest dynamical extension of the local field correction, which can be introduced by this technique.…”

Section: Local Field Corrections For An Interacting Electron Gasmentioning

confidence: 99%

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Influence of local-field corrections on Thomson scattering in collision-dominated two-component plasmas

2010

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Thomson scattering in non-ideal (collision-dominated) two-component plasmas is calculated accounting for electron-ion collisions as well as electron-electron correlations. This is achieved by using a novel interpolation scheme for the electron-electron response function generalizing the traditional Mermin approach. Also, ions are treated as randomly distributed inert scattering centers. The collision frequency is taken as a dynamic and complex quantity and is calculated from a microscopic quantum-statistical approach. Implications due to different approximations for the electron-electron correlation, i.e. different forms of the OCP local field correction, are discussed.

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Section: Local Field Corrections For An Interacting Electron Gasmentioning

confidence: 99%

Section: Local Field Corrections For An Interacting Electron Gasmentioning

confidence: 99%

Influence of local-field corrections on Thomson scattering in collision-dominated two-component plasmas

2010

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“…Dynamic local field corrections can be derived using the method of recurrence relations [22,23]. The result is a smooth interpolation between the two static local field corrections at ω = 0 and ω = ∞ presented above…”

mentioning

confidence: 99%

Dynamic Ion Structure Factor of Warm Dense Matter

et al. 2012

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The dynamics of the ion structure in warm dense matter is determined by molecular dynamics simulations using an effective ion-ion potential. This potential is obtained from ab initio simulations and has a strong short-range repulsion added to a screened Coulomb potential. Models based on static or dynamic local field corrections are found to be insufficient to describe the data. An extended Mermin approach, a hydrodynamic model and the method of moments with local constraints are capable of reproducing the numerical results but have rather limited predictive powers as they all need some numerical data as input. The method of moments is found to be the most promising.

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“…The recurrence method [26] allows to express the dynamic local field correction G(k, ω) in terms of static properties, the so-called recurrents ∆ ν . These recurrents are related to the moments of the dynamic structure factor.…”

Section: Dynamic Structure Factor Of Yukawa Plasmas and Recurrence Mementioning

confidence: 99%

Dynamic Structure Factor of Dusty and Low‐Dimensional Plasmas

Wierling

Reinholz

Röpke

et al. 2005

Contrib. Plasma Phys.

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Experiences investigating the dynamic structure factor of dense plasmas are applied to complex plasmas, in particular to dusty plasmas and dimensionally reduced plasmas. Using generalized linear response theory, the dynamical structure factor is obtained from a density response function expressed in terms of equilibrium correlation function. Corrections beyond the RPA approximation are taken into account by evaluating localfield corrections within the recurrance method. Results for the dynamic structure factor of a Yukawa plasma is compared with molecular dynamics calculations. . Concepts from standard dense ionic plasmas are extended to new systems. The aim is to probe the limits of applicability and to get new insight into the relevant microscopic processes in strongly coupled plasmas. It is also expected that such systems may exhibit new properties which are of interest with respect to technical applications.An important example for plasmas with reduced dimensionality is the electron-hole-exciton system produced in semiconductor heterostructures. In contrast to standard ionic plasmas, in addition to the Coulomb interaction the excitation and recombination of electron-hole pairs is of importance. They are presently of increasing interest, since the manufacturing of such nanostructured materials is experimentally feasible and of technological importance. The theoretical investigations of such systems is one aspect in the search for materials with certain desired properties and new applications. Layered, two-dimensional structures can be found not only in semiconductor heterostructures, but also in different physical systems such as ion traps or dusty plasmas where chemical reactions are also of interest.Dusty plasmas are multicomponent plasmas consisting of charged micron-sized particles, electrons, ions, and a neutral background gas. In such a system, the micron-sized particles also referred to as dust grains can attain high charges of several 10 3 e. Ikezi has pointed out, that the interaction between these highly charged dusty particles may lead to strong structural ordering [3]. In particular, liquid phases and plasma crystals have been predicted and also observed experimentally [4].Special experimental effort is necessary to stabilize dusty plasmas. At present, dusty plasmas have been studied in all dimensions, as 1D chains [5], 2D layers [6], and 3D systems. An elegant method to avoid the influence of gravitation which disturbs the formation of a stationary plasma state are microgravity experiments performed in space stations or in ballistic vehicles.Under certain conditions, the inter-dust potential in dusty plasmas can be approximated by a one-component system of negatively charged dust grains immersed in a uniform background of opposite charge and interacting via a Yukawa potential [7] V (r) = Q

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Exact Dynamically Convergent Calculations of the Frequency-Dependent Density Response Function

Cited by 62 publications

References 25 publications

Influence of local-field corrections on Thomson scattering in collision-dominated two-component plasmas

Influence of local-field corrections on Thomson scattering in collision-dominated two-component plasmas

Dynamic Ion Structure Factor of Warm Dense Matter

Dynamic Structure Factor of Dusty and Low‐Dimensional Plasmas

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