Study of coulomb drag with the effect of local field correction and dielectric medium

Upadhyay, Sharad Kumar; Saini, L. K.

doi:10.1016/j.physb.2021.412982

Cited by 3 publications

(1 citation statement)

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“…where χ 0 (q, ω) and χ(q, ω) are the dynamic density response functions of noninteracting and interacting systems, respectively, and v q = 8π/q 2 is the long-range Coulomb repulsion (Rydberg atomic units are used). The LFC encodes the structure of effective electron-electron interaction and is crucial for the understanding of many experimental phenomena, exemplified by plasmon [11,20], Coulomb and spin-Coulomb drag effects [21,22], electrical and thermal conductivities [23,24], stopping power [25,26], and energy transfer rates [27]. In the timedependent density functional theory (TDDFT) [19,28], the so-called XC kernel, K xc (q, ω) = −v q G(q, ω), is typically used as an input for ab-inito calculations of groundstate energies and electronic spectra in real materials.…”

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confidence: 99%

Exchange-correlation effect in the charge response of a warm dense electron gas

Hou,

Wang,

Haule

et al. 2022

Preprint

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The study of warm dense matter, widely existing in nature and laboratories, is challenging due to the interplay of quantum and classical fluctuations. We develop a variational diagrammatic Monte Carlo method, determine the exchange-correlation kernel Kxc(T, q) of a warm dense electron gas for a broad range of temperature T and momentum q, and observe several interesting features like the emergence of a scaling relation. Particularly, by deriving an analytical form for q → ∞, we obtain large-q tails of Kxc with high precision. It is shown that the Kxc data can be reliably transformed into real space, which can be directly used in density-functional-theory calculations of real warm dense matter.

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confidence: 99%

Exchange-correlation effect in the charge response of a warm dense electron gas

Hou,

Wang,

Haule

et al. 2022

Preprint

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Exchange-correlation effect in the charge response of a warm dense electron gas

et al. 2022

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Drag Resistivity of Hole-Hole Static Interactions with the Effect of Non- Homogeneous Dielectric Medium

Upadhyay

Sainia

2023

CNM

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BACKGROUND: We have study the Coulomb drag phenomena for hole-hole static potentials theoretically and measured numerically using the random phase approximation (RPA) method OBJECTIVE: The drag resistivity is evaluated at low temperature, large interlayer separation limit and weakly screening regime, with the geometry of two atomically thin materials, such as, BLG/GaAs based multilayer system, is a promising systems in nanomaterials and technology METHOD: Static local field corrections (LFC) are considered to take into account the Exchange-correlations (XC) and mutual interaction effects with varying concentrations of active and passive layer RESULT: It is found that the drag resistivity is found enhanced on using the LFC effects and increases on increasing the effective mass. In Fermi-Liquid regime, drag resistivity is directly proportional to T^2, n^(-3), d^(-4) and ϵ^2 with respect to temperature (T), density (n), interlayer separation (d~nm) and dielectric constant (ϵ_2), respectively. CONCLUSION: Dependency of drag resistivity is measured and compared to 2D e-e and e-h coupled-layer systems with and without the effect of non-homogeneous dielectric medium.

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Study of coulomb drag with the effect of local field correction and dielectric medium

Cited by 3 publications

References 64 publications

Exchange-correlation effect in the charge response of a warm dense electron gas

Exchange-correlation effect in the charge response of a warm dense electron gas

Exchange-correlation effect in the charge response of a warm dense electron gas

Drag Resistivity of Hole-Hole Static Interactions with the Effect of Non- Homogeneous Dielectric Medium

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