Density functional theory for superconductors with particle-hole asymmetric electronic structure

2013/05/02 by Ryosuke Akashi, Ryotaro Arita · 2 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Density functional theory #Electronic and Structural Properties of Oxides #Electronic structure #Geology #Materials science #Particle (ecology) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Statistical physics #Superconductivity #Superconductivity in MgB2 and Alloys #Theoretical physics #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.88.014514

published as Phys. Rev. B 88, 014514 (2013); with a small revision · 12 pages, 7 figures

arxiv created 2013/05/02 · openalex publication_date 2013/07/18 · arxiv updated 2013/07/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

To extend the applicability of density functional theory for superconductors (SCDFT) to systems with significant particle-hole asymmetry, we construct an improved exchange-correlation kernel entering the gap equation. We show that the kernel is numerically stable and does not diverge even in the low-temperature limit. Solving the gap equation for model systems with the present kernel analytically and numerically, we find that the asymmetric component of electronic density of states, which has not been considered with the previous kernel, systematically decreases transition temperature (T_c). We present a case where the decrease of T_c amounts to several tens of percent.

Citations

• On a new method in the theory of superconductivity
• Self-interaction correction to density-functional approximations for many-electron systems
• Transition Temperature of Strong-Coupled Superconductors
• Calculation of the Superconducting State Parameters with Retarded Electron-Phonon Interaction
• QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials

Cited by

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