Carl A. Kukkonen
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View article: Charge density waves and superconductivity in the electron-positive fermion gas using a simple intuitive model. Part I: The model, instabilities, and phase diagram
Charge density waves and superconductivity in the electron-positive fermion gas using a simple intuitive model. Part I: The model, instabilities, and phase diagram Open
The electron-positive fermion gas in three dimensions and $T=0$ is modeled as two independent fermion gases interacting via the coulomb interaction. The main advantage of the simple model is that all existing results from the electron gas …
View article: Charge density waves and superconductivity in the electron-positive fermion gas using a simple intuitive model. Part II: Collective modes, effective interactions, superconductivity, and transport
Charge density waves and superconductivity in the electron-positive fermion gas using a simple intuitive model. Part II: Collective modes, effective interactions, superconductivity, and transport Open
Superconductivity and the normal state electrical resistivity which varies as $T^2$ are strongly enhanced near the compressibility and charge density wave instabilities in the electron-positive fermion gas. The additional screening from th…
View article: <i>Ab initio</i> calculations of superconducting transition temperatures: When going beyond RPA is essential
<i>Ab initio</i> calculations of superconducting transition temperatures: When going beyond RPA is essential Open
In ab initio calculations of superconducting properties, the Coulomb repulsion is accounted for at the GW level and is usually computed in the random phase approximation (RPA), which amounts to neglecting vertex corrections both at the pol…
View article: Coulomb interactions and conventional superconductivity: when going beyond the random phase approximation is essential
Coulomb interactions and conventional superconductivity: when going beyond the random phase approximation is essential Open
In ab initio calculations of superconducting properties, the Coulomb repulsion is accounted for at the GW level and is usually computed in RPA, which amounts to neglecting vertex corrections both at the polarizability level and in the self…
View article: QMC-consistent static spin and density local field factors for the uniform electron gas
QMC-consistent static spin and density local field factors for the uniform electron gas Open
Analytic mathematical models for the static spin ($G_-$) and density ($G_+$) local field factors for the uniform electron gas (UEG) as functions of wavevector and density are presented. These models closely fit recent quantum Monte Carlo (…
View article: Insights into the Electron-Electron Interaction from Quantum Monte Carlo Calculations
Insights into the Electron-Electron Interaction from Quantum Monte Carlo Calculations Open
The effective electron-electron interaction in the electron gas depends on both the density and spin local field factors. Variational Diagrammatic Quantum Monte Carlo calculations of the spin local field factor are reported and used to qua…
View article: John Warren Wilkins
John Warren Wilkins Open
John Warren Wilkins, Ohio Eminent Scholar and professor of physics emeritus at the Ohio State University (OSU), died on 6 December 2019 in Columbus, Ohio. John Warren Wilkins BENGT LUNDQVIST/CHALMERS UNIVERSITYPPT|High-resolutionBorn on 11…