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

We successfully grew the high-quality single crystals of $A_{x}$Fe$_2$Se$_2$($A$ = K and Cs) by self-flux method. Sharp superconducting transition wasobserved for both types of crystals. The crystals show the onsetsuperconducting transition temperatures ($T_{\rm c}$) of 31 K and 30 K for K-and Cs-compounds, respectively, with nearly 100% shielding fraction. Thecrystals show quite high resistivity in the normal state of more than 160m$\Omega$ cm and 1300 m$\Omega$ cm maximum resistivity for$K_{0.86}Fe_2Se_{1.82}$ and $Cs_{0.86}Fe_{1.66}Se_{2}$ single crystals,respectively. Much larger upper critical field $H_{\rm c2}$ is inferred fromlow-temperature iso-magnetic-field magnetoresistance in these crystals than inFeSe. The anisotropy $H^{ab}_{\rm c2}$(0)/$H^{c}_{\rm c2}$(0) is around 3 forboth of the two materials. Anisotropic peculiar magnetic behavior in normalstate has been found for $Cs_{0.86}Fe_{1.66}Se_{2}$

Superconductivity and Magnetic Properties of high-quality single crystals of $A_{x}$Fe$_2$Se$_2$ ($A$ = K and Cs)