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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Following the discovery of superconductivity in quasi-one-dimensionalK$_2$Cr$_3$As$_3$ containing [(Cr$_3$As$_3$)$^{2-}$]$_{\infty}$ chains [J. K.Bao et al., arXiv: 1412.0067 (2014)], we succeeded in synthesizing an analogouscompound, Rb$_2$Cr$_3$As$_3$, which also crystallizes in a hexagonal lattice.The replacement of K by Rb results in an expansion of $a$ axis by 3\%,indicating a weaker interchain coupling in Rb$_2$Cr$_3$As$_3$. Bulksuperconductivity emerges at 4.8 K, above which the normal-state resistivityshows a linear temperature dependence up to 35 K. The estimated upper criticalfield at zero temperature exceeds the Pauli paramagnetic limit by a factor oftwo. Furthermore, the electronic specific-heat coefficient extrapolated to zerotemperature in the mixed state increases with $\sqrt{H}$, suggesting existenceof nodes in the superconducting energy gap. Hence Rb$_2$Cr$_3$As$_3$ manifestsitself as another example of unconventional superconductor in theCr$_3$As$_3$-chain based system.

Unconventional superconductivity in quasi-one-dimensional Rb$_2$Cr$_3$As$_3$