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/

Zendy Plus

Presents the zaia usage as premium feature

ZAIA

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the access of premium content as premium feature

Premium Content

Zendy Tools

Zendy Open

We report magnetic, specific heat and ESR measurements on a series of $S=1/2$spin ladder compounds Cu(Qnx)(Cl$_{(1-x)}$Br$_{x}$)$_{2}$. Down to $T=2$ K allthe observables can be described by the spin ladder model with about 1% of$S=1/2$ impurities in the background, which are present even in a nominallypure Cu(Qnx)Cl$_{2}$ and Cu(Qnx)Br$_{2}$, for the whole range of $0\leqx\leq1$. We extract ladder exchange constants $J_{l}(x)$ and $J_{r}(x)$ as wellas the gap value $\Delta(x)$ by comparing the experimental data to quantumMonte-Carlo simulations. As the ESR measurements show the $g$-factor ofimpurities to be precisely equal to $g$-factor of the ladder spins, we supposethe impurities to be the consequence of structural defects resulting in abroken ladder ends.

The tunable quantum spin ladder Cu(Qnx)(Cl$_{(1-x)}$Br$_{x}$)$_{2}$