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

Spin liquids are exotic phases of quantum matter challenging Landau'sparadigm of symmetry-breaking phase transitions. Despite strong exchangeinteractions, spins do not order or freeze down to zero temperature. Whilewell-established for 1D quantum antiferromagnets, in higher dimension wherequantum fluctuations are less acute, realizing and understanding such statesrepresent major issues, both theoretical and experimental. In this respect thesimplest nearest-neighbor Heisenberg antiferromagnet Hamiltonian on the highlyfrustrated kagome lattice has proven to be a fascinating and inspiring model.The exact nature of its ground state remains elusive and the existence of aspin-gap is the first key-issue to be addressed to discriminate between thevarious classes of proposed spin liquids. Here, through low-temperature NuclearMagnetic Resonance (NMR) contrast experiments on high quality single crystals,we single out the kagome susceptibility and the corresponding dynamics in thekagome archetype, the mineral herbertsmithite, ZnCu$_3$(OH)$_6$Cl$_2$. Wefirmly conclude that this material does not harbor any spin-gap, which restoresa convergence with recent numerical results promoting a gapless Dirac spinliquid as the ground state of the Heisenberg kagome antiferromagnet.

Gapless ground state in the archetypal quantum kagome antiferromagnet ZnCu$_3$(OH)$_6$Cl$_2$