Superconducting pairing mediated by spin fluctuations from first principles

被引：44

作者：

Essenberger, F. ^{[1
]}

Sanna, A. ^{[1
]}

Linscheid, A. ^{[1
]}

Tandetzky, F. ^{[1
]}

Profeta, G. ^{[2
]}

Cudazzo, P. ^{[3
,4
,5
]}

Gross, E. K. U. ^{[1
]}

机构：

[1] Max Planck Inst Microstruct Phys, Weinberg 2, D-06120 Halle, Germany

[2] CNR, Superconducting & Innovat Mat & Devices CNR SPIN, I-67100 Laquila, Italy

[3] Univ Basque Country, Dept Fis Mat, Nanobio Spect Grp, Ctr Fis Mat CSIC UPV EHU MPC, E-20018 San Sebastian, Spain

[4] DIPC, E-20018 San Sebastian, Spain

[5] European Theoret Spect Facil, San Sebastian, Spain

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 21期

关键词：

DENSITY-FUNCTIONAL THEORY; STRONG-COUPLED SUPERCONDUCTORS; ELECTRON-PHONON INTERACTION; HIGH-TC SUPERCONDUCTIVITY; TRANSITION-TEMPERATURE; GREENS-FUNCTION; FERMI LIQUIDS; GAS; SYSTEMS; METALS;

D O I：

10.1103/PhysRevB.90.214504

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present the derivation of an ab initio and parameter-free effective electron-electron interaction that goes beyond the screened random phase approximation and accounts for superconducting pairing driven by spin fluctuations. The construction is based on many-body perturbation theory and relies on the approximation of the exchange-correlation part of the electronic self-energy within time-dependent density functional theory. This effective interaction is included in an exchange-correlation kernel for superconducting density functional theory in order to achieve a completely parameter free superconducting gap equation. First results from applying the new functional to a simplified two-band electron gas model are consistent with experiments.

引用

页数：11

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