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 report inelastic neutron scattering on single crystals of the bilayercuprate family La$_{2-x}$Ca$_{1+x}$Cu$_{2}$O$_{6+\delta}$, including twocrystals made superconducting (transitions at 45 and 55 K) by high-pressureannealing in an oxygen-containing atmosphere. The magnetic excitations in thenon-superconducting crystal have a similar temperature-dependence as those inweakly hole-doped cuprates. In the superconducting crystals, there is anear-uniform suppression of the magnetic spectral weight with increasingtemperature; in particular, there are no signs of a spin gap or "resonance"peak. This is different from the temperature dependence seen in manyoptimally-doped cuprates but similar to the behavior seen in certain underdopedcuprates. We discuss the possible connection with pair-density-wavesuperconductivity.

Gapless spin excitations in superconducting La$_{2-x}$Ca$_{1+x}$Cu$_{2}$O$_{6}$ with $T_c$ up to 55 K