16 Results Found

The phenomenology of the iron pnictide superconductor can be described by the three-band $s\pm$ Eliashberg theory in which the mechanism of superconducting coupling is mediated by antiferromagnetic spin fluctuations and whose characteristic energy...

I solved the Eliashberg equations for a multiband non-phononic $s\pm$ wave spin-glass superconductor, calculating the temperature dependence of the gaps and of superfluid density. Their behaviors were revealed to be unusual: showing non-monotonic...

The experimental critical temperature of the systems of superconducting ($Pb$) and normal ($Ag$, $Cu$ and $Al$) nanoparticles, with a random distribution and sizes less than their respective coherence lengths, is governed by the proximity effect, as shown by...

It is known that noble metals such as gold, silver and copper are not superconductors; this is also true for magnesium. This is due to the weakness of the electron–phonon interaction, which makes them excellent conductors but not superconductor...

Internal energies, enthalpies, phonon dispersion curves, and superconductivity of atomic metallic hydrogen are calculated. The standard use of pseudopotentials in density-functional theory are compared with full Coulomb-potential, all-electron linear...

I calculated the critical temperature and superconducting gap in the framework of one band d wave Eliashberg theory with only one free parameter in order to reproduce the experimental data relative to $B{i}_{2}S{r}_{2}CaC{u}_2{O}_{8+\delta }$$\left(BSCCO\right)$ in the overdoped regime. T...

The temperature dependence of the two superconducting gaps in pressurised $H_{3}S$ at 155 GPa with a critical temperature of 203 K has been determined using a data analysis of the experimental curve of the upper critical magnetic field as a function of te...

The discovery of a record high superconducting transition temperature (T_c) of 288 K in a pressurized hydride inspires new hope to realize ambient-condition superconductivity. Here, we give a perspective on the theoretical and experimental studies of...

The rate of energy transfer between electrons and phonons is investigated by a first-principles framework for electron temperatures up to $T_e$ = 50,000 K while considering the lattice at ground state. Two typical but differently complex metals are inve...

The origin of the pseudogap and superconducting behaviors in high-$T_c$ superconductors is proposed, based on the picture of Euclidean Q-balls formation that carry Cooper/local-pair condensates inside their volumes. Euclidean Q-balls that describe bubbl...

In the present paper, we report the breakdown of the adiabatic picture of superconductivity in a calcium-doped hexagonal boron nitride (Ca-h-BN) monolayer and discuss its implications for the selected properties of this phase. In particular, it is sh...

Thermodynamic properties of the s–wave symmetry superconducting phase in three selected structures of the ${\mathrm{BaGe}}_3$ compound ( $P{6}_3/mmc$ , $Amm2$ , and $I4/mmm$ ) were discussed in the context of DFT results o...

The experimental discovery that compressed sulfur hydride exhibits superconducting transition temperature of $T_c=203 \mathrm{K}$ by Drozdov et al. (Nature 2015, 525, 73–76) sparked studies of compressed hydrides. This discovery was not a straigh...

The classical Bardeen–Cooper–Schrieffer and Eliashberg theories of the electron–phonon-mediated superconductivity are based on the Migdal theorem, which is an assumption that the energy of charge carriers, $k_B{T}_F$, significantly exceed...

Bulk n-type SrTiO₃ (STO) has long been known to possess a superconducting ground state at an exceptionally dilute carrier density. This has raised questions about the applicability of the BCS-Eliashberg paradigm with its underlying adiabatic assumpti...

This review covers several recent developments in the physics of dense QCD with an emphasis on the impact of multiple phase transitions on astrophysical manifestations of compact stars. To motivate the multi-phase modeling of dense QCD and delineate...