ﻻ يوجد ملخص باللغة العربية
We report the synthesis of tetragonal $mathrm{FeS}_xmathrm{Se}_{1-x}$ films ($x leq 0.78$) by pulsed-laser deposition. To fabricate the tetragonal alloy films with tetragonal FeSe and hexagonal FeS targets, we adopted an alternate deposition technique with FeSe buffer layer on MgO(001). The overall film composition is controlled by the thickness ratio of FeS / FeSe layers. The out-of-plane lattice parameter of the films follows Vegards law, demonstrating homogeneous alloying by inter-diffusion. The sulfur solid solubility reaches $x = 0.78$ in the $mathrm{FeS}_xmathrm{Se}_{1-x}$ films, which is by far larger than $x approx 0.40$ in bulk governed by the tetragonal phase instability.
We report the successful growth of epitaxial thin films of FeSe$_{1-x}$S$_x$ with $x leq 0.43$ via pulsed laser deposition. As S content increases, the nematic transition temperature, $T_{mathrm s}$, decreases systematically and the superconducting t
Pulsed laser deposition, a non-equilibrium thin-film growth technique, was used to stabilize metastable tetragonal iron sulfide (FeS), the bulk state of which is known as a superconductor with a critical temperature of 4 K. Comprehensive experiments
A huge enhancement of the superconducting transition temperature Tc was observed in tetragonal FeSe superconductor under high pressure. The onset temperature became as high as 27 K at 1.48 GPa and the pressure coefficient showed a huge value of 9.1 K
As the simplest iron-based superconductor, FeSe forms a tetragonal structure with transition temperature Tc ~ 8 K. With assistance of pressure, or other techniques, Tc can be greatly enhanced, even to above liquid nitrogen temperature. The newly disc
There is an ongoing debate about the relative importance of structural change versus doping charge carriers on the mechanism of superconductivity in Fe-based materials. Elucidating this issue is a major challenge since it would require a large number