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

Gallium (Ga) displays several metastable phases. Superconductivity isstrongly enhanced in the metastable $\mathrm{\beta}$-Ga with a criticaltemperature $T_\mathrm{c}= 6.04(5)\,\mathrm{K}$, while stable$\mathrm{\alpha}$-Ga has a much lower $T_\mathrm{c}<1.2\,\mathrm{K}$. Here weuse a membrane-based nanocalorimeter to initiate the transition from$\mathrm{\alpha}$-Ga to $\mathrm{\beta}$-Ga on demand, as well as study thespecific heat of the two phases on one and the same sample. The in-situtransformation is initiated by bringing the temperature to about$10\,\mathrm{K}$ above the melting temperature of $\mathrm{\alpha}$-Ga. Aftersuch treatment, the liquid supercools down to $232\,\mathrm{K}$, where$\mathrm{\beta}$-Ga solidifies. We find that $\mathrm{\beta}$-Ga is astrong-coupling type-I superconductor with $\Delta(0)/k_\mathrm{B}T_\mathrm{c}=2.00(5)$ and a Sommerfeld coefficient $\gamma_\mathrm{n} =1.53(4)\,\mathrm{mJ/molK^2}$, 2.55 times higher than that in the $\alpha$phase. The results allow a detailed comparison of fundamental thermodynamicproperties between the two phases.

Raising the superconducting $T_\mathrm{c}$ of gallium: in-situ characterization of the transformation of $\alpha$-Ga into $\beta$-Ga