Resistive transition of hydrogen-rich superconductors

Abstract

Critical temperature, $T_c$, and the transition width, $\Delta$$T_c$, are two primary parameters of the superconducting transition. The latter parameter reflects the superconducting state disturbance originating from the thermodynamic fluctuations, atomic disorder, applied magnetic field, the presence of secondary crystalline phases, applied pressure, etc. Recently, Hirsch and Marsiglio (2020 arXiv:2012.12796) performed an analysis of the transition width in several near-room-temperature superconductors (NRTS) and reported that the reduced transition width, $\Delta$$T_c$$/$$T_c$, in these materials does not follow a conventional trend of transition width broadening on applied magnetic field observed in low- and high-$T_c$ superconductors. Here we present thorough mathematical analysis of the magnetoresistive data, $R(T,B)$, for the high-entropy alloy $(ScZrNb{)}_{0.65}$$[RhPd{]}_{0.35}$ and hydrogen-rich superconductors of Im-3m-$H_{3}S$, C2/m-$La{H}_{10}$ and P63/mmc-$Ce{H}_9$. We found that the reduced transition width, $\Delta$$T_c$$/$$T_c$, in these materials does follow a conventional broadening trend on applied magnetic field.

32 pages, 13 figures

References in corpus (12)

• Highly crystalline 2D superconductors
• Hydrogen sulphide at high pressure: a strongly-anharmonic phonon-mediated superconductor
• A superconducting praseodymium nickelate with infinite layer structure
• Superconductivity in sodalite-like yttrium hydride clathrates
• Superconducting Phase-Diagram of H3S under High Magnetic Fields
• Nonstandard superconductivity or no superconductivity in hydrides under high pressure
• Quantitative analysis of nonadiabatic effects in dense H${}_3$S and PH${}_3$ superconductors
• Fe-based superconducting thin films on metallic substrates: growth, characteristics and relevant properties
• Anomalous behavior in high-pressure carbonaceous sulfur hydride
• London penetration depth and thermal fluctuations in the sulphur hydride 203 K superconductor
• Critical current density and magnetic phase diagram of BaFe1.29Ru0.71As2 Single Crystals
• Vortex-glass transformation within the surface superconducting state of $\beta$-phase Mo${}_{1-x}$Re${}_x$ alloys

Cited by in corpus (7)

• High-temperature superconductivity in hydrides
• Progress, problems and prospects of room-temperature superconductivity
• Broadening of In-Field Superconducting Transitions in Hydrides
• Fermi-liquid nonadiabatic highly-compressed cesium iodide superconductor
• Classifying charge carrier interaction in highly-compressed elements and silane
• Structural and superconducting parameters of highly compressed sulfur
• Einstein and Debye temperatures, electron-phonon coupling constant and a probable mechanism for ambient-pressure room-temperature superconductivity in intercalated graphite