A1 Journal article – refereed
Evidence for melting of HD and D-2 clusters in solid neon below 1 K




List of Authors: Sheludiakov S, Ahokas J, Jarvinen J, Lehtonen L, Vasiliev S, Dmitriev YA, Lee DM, Khmelenko VV
Publisher: AMER PHYSICAL SOC
Publication year: 2019
Journal: Physical Review B
Journal name in source: PHYSICAL REVIEW B
Journal acronym: PHYS REV B
Volume number: 99
Issue number: 17
Number of pages: 8
ISSN: 2469-9950
eISSN: 2469-9969

Abstract
We report on an electron spin resonance study of H and D atoms stabilized in solid mixtures of neon, molecular deuterium, and hydrogen deuteride. We observed that H and D atoms can be stabilized in pure HD and D-2 clusters formed in pores of solid Ne as well as in a Ne environment. Raising temperature from 0.1 to 1.3 K results in a rapid recombination of a significant fraction of both H and D atoms in HD and D-2 clusters. The recombination rate appears to be five and seven orders of magnitude faster than in solid bulk samples of HD and D-2, respectively. We explain this recombination rate enhancement by melting of clusters of molecular hydrogen isotopes, similar to what has been observed for atomic hydrogen in H-2 clusters [Sheludiakov et al., Phys. Rev. B 97, 104108 (2018)]. Our observations do not provide evidence for a superfluid behavior of these clusters at temperatures of 0.1-1.3 K.

Downloadable publication

This is an electronic reprint of the original article.
This reprint may differ from the original in pagination and typographic detail. Please cite the original version.




Last updated on 2019-21-08 at 20:32