Phys. Rev. Lett. 88, 155701 (2002) [4 pages]Mobility Transition of Solid Rare Gases in Confined EnvironmentsReceived 14 June 2001; published 1 April 2002 We report the results of x-ray diffraction and small angle scattering studies of Ar and Kr confined in sol-gel and Vycor glasses. The confined liquid crystallizes in a disordered hcp structure on freezing. Upon further cooling a sharp transition occurs at a reduced temperature of T/Tm≈0.65, where the crystalline structure disappears and the total scattering decreases. This behavior marks the onset of a well-defined mobility transition, where the confined sample migrates out of the pore space. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.155701
DOI:
10.1103/PhysRevLett.88.155701
PACS:
64.70.Kb, 61.10.Eq, 61.43.Gt, 66.30.Hs
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