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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The heat capacity of a small amount of $^3$He atoms dissolved in submonolayer$^4$He film has been measured. The measured heat capacity is finite andsuggests that $^3$He atoms are mobile at an areal density regime higher thanthat of the $\sqrt{3}\times\sqrt{3}$ phase, where $^4$He films are believed tobe solid. At higher areal densities, the measured heat capacity is proportionalto $T^2$ and depends on the amounts of $^3$He atoms. These behaviors areanomalous to that of a two-dimensional Fermi fluid, and cannot be explained byuniform melting of $^4$He films. One possible explanation for these anomalousbehaviors is that helium atoms exhibit fluidity only inside the domain walls ofthe adsorption structure, and the dissolved $^3$He atoms gather into them andbehave as a one-dimensional Fermi fluid or as Dirac fermions, depending on thestructure of the domain walls. The behaviors of the measured heat capacitystrongly suggest this possibility.

Fluidity in Domain Walls in Dilute $^3$He-$^4$He Films on Graphite: Possible 1D Fermi Fluid and Dirac Fermions in Helium Film