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

In the temperature (T)-nuQ3 phase diagram of NaxCoO2 \dot yH2O, there existtwo superconducting regions of nuQ3 separated by the nonsuperconducting region,where nuQ3 is usually estimated from the peak position of the 59Co-NQR spectraof the 5/2-7/2 transition and well-approximated here as nuQ3~3nuQ,nuQ being theinteraction energy between the nuclear quadrupole moment and the electric fieldgradient. We have carried out measurements of the 59Co-NMR Knight shift (K) fora single crystal in the higher-nuQ3 superconducting phase and found that Kbegins to decrease with decreasing T at Tc for both magnetic field directionsparallel and perpendicular to CoO2-planes. The result indicates together withthe previous ones that the superconducting pairs are in the spin-singlet statein both phases, excluding the possibility of the spin-triplet superconductivityin this phase diagram. The superconductivity of this system spreads over thewide nuQ3 regions, but is suppressed in the narrow region located at the middlepoint of the region possibly due to charge instability.

Co-NMR Knight Shift of NaxCoO2 \dot yH2O Studied in Both Superconducting Regions of the Tc-nuQ3 Phase Diagram Divided by the Nonsuperconducting Phase