English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

X-ray diffraction indicates that the structure of the recently discoveredroom temperature carbonaceous sulfur hydride (C-S-H) superconductor is derivedfrom previously established van der Waals compounds found in the H$_2$S-H$_2$and CH$_4$-H$_2$ systems. Crystals of the superconducting phase were producedby a photochemical synthesis technique leading to the superconducting criticaltemperature $T_c$ of 288 K at 267 GPa. Single-crystal x-ray diffractionpatterns measured from 124 to 178 GPa, within the pressure range of thesuperconducting phase, give an orthorhombic structure derived from theAl$_2$Cu-type determined for (H$_2$S)$_2$H$_2$ and (CH$_4$)$_2$H$_2$ thatdiffers from those predicted and observed for the S-H system to thesepressures. The formation and stability of the C-S-H compound can be understoodin terms of the close similarity in effective volumes of the H$_2$S and CH$_4$components over a broad range of pressures. The relative amounts of carbon andsulfur in the structure is not determined, and denser carbon-bearing S-Hstructures may form at higher pressures. The results are consistent withhole-doping enhancement of $T_c$ by carbon proposed for the room-temperaturesuperconductivity in this system.

X-ray Diffraction and Equation of State of the C-S-H Room-Temperature Superconductor