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Freezing and melting of vortex ice

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arxiv 1307.2881 v1 pith:TK4SBOHF submitted 2013-07-10 cond-mat.supr-con cond-mat.mes-hall

Freezing and melting of vortex ice

J. Trastoy , M. Malnou , C. Ulysse , R. Bernard , N. Bergeal , G. Faini , J. Lesueur , J. Briatico
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Javier E. Villegas
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classification cond-mat.supr-con cond-mat.mes-hall
keywords vortexartificialfreezingmeltingallowsannealingapproachedarray
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report on the realization of artificial ice using superconducting vortices in geometrically frustrated pinning arrays. This vortex ice shows two unique properties among artificial ice systems. The first comes from the possibility to switch the array geometric frustration on/off through temperature variations, which allows "freezing" and "melting" the vortex ice. The second is that the depinning and dynamics of the frozen vortex ice are insensitive to annealing, which implies that the ordered ground state is spontaneously approached. The major role of thermal fluctuations and the strong vortex-vortex interactions are at the origin of this unusual behavior.

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