Superfluidity of metastable glassy bulk para-hydrogen at low temperature
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hdl:2117/16406
Tipus de documentArticle
Data publicació2012-06-13
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Abstract
Molecular para-hydrogen has been proposed theoretically as a possible
candidate for superfluidity, but the eventual superfluid transition is hindered
by its crystallization. In this work, we study a metastable non crystalline
phase of bulk p-H2 by means of the Path Integral Monte Carlo method in order to
investigate at which temperature this system can support superfluidity. By
choosing accurately the initial configuration and using a non commensurate
simulation box, we have been able to frustrate the formation of the crystal in
the simulated system and to calculate the temperature dependence of the
one-body density matrix and of the superfluid fraction. We observe a transition
to a superfluid phase at temperatures around 1 K. The limit of zero temperature
is also studied using the diffusion Monte Carlo method. Results for the energy,
condensate fraction, and structure of the metastable liquid phase at T=0 are
reported and compared with the ones obtained for the stable solid phase.
CitacióOsychenko, O.; Rota, R.; Boronat, J. Superfluidity of metastable glassy bulk para-hydrogen at low temperature. "Physical review B: condensed matter and materials physics", 13 Juny 2012, vol. 85, núm. 22, p. 1-10.
ISSN1098-0121
Versió de l'editorhttp://arxiv.org/pdf/1206.3035v1.pdf
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