Eliashberg

Karmarkar U, Lele M (2005) The Marketing/Manufacturing Interface Strategic Issues. In Chakravarty A, Eliashberg J (eds) Managing Business Interfaces, pp 311-328... 

Moreover the effective repulsive Coulomb pseudopotential in the Migdal-Eliashberg theory is expected to decrease (so the effective coupling strength increases) where the interband pairing is dominant. 

We are now able to estimate Tc for the hydrocarbon monoanions by using the approximate solution of the Eliashberg equation [20]. On the basis of the calculated BCS electron-phonon coupling constants [21], we estimate Tc s using McMillan s formula [22,23]. McMillan s formula was derived from a three-dimensional formalism, while the electron carriers in acene-edge-type molecules form a quasi-two-dimensional system. But we believe that McMillan s formula is still available for qualitative discussions. For A < 1.5, this is available for an approximate solution to the Eliashberg equations... 

Things become more difficult when one tries to measure the anisotropic Eliashberg function by means of the SC tunneling. The single-band numerical inversion program gives uncertain results, as was shown in Ref. [25]. 

Very rarely, (see [35]) the structure in d2V/dI2 which corresponds reasonably in shape to the phonon DoS (above 30 meV) was obtained. Thus, for this contact one can assume the observation of the inelastic PC spectrum for the 7r band, which is comparable to the Eliashberg EPI function for the same band calculated in Ref. [36]. Both experimental spectrum and 1r band Eliashberg function do not show the anomalously... 

Thus, considering results on y(H) only, a possible unconventional pairing in borocarbides cannot be ruled out. Similarly it has been noted by Dobrosavljevic-Grujic and Miranovic (2003) that a sizable anisotropy of the s-wave gap function leads to strong deviations for the specific heat in the superconducting state from the predictions of the one-band isotropic BCS-Eliashberg theory. In particular, at low temperatures gap-node like dependencies may appear. 

They are coupled to each other through Eliashberg-type equations, which can be expressed, in the position and the Matzubara (ojn) representations, as ... 

The emergence of superconductivity in electronic systems close to a ferromagnetic instability has recently been studied by solving a linearized gap equation within the Eliashberg formalism [3-5], In both two- (2D) and three-dimensional (3D) systems, it was found that the superconducting transition temperature, Tlc (T stands for linearized) substantially decreases as the sys-... 

---