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    Critical behavior at the dynamic Mott transition 
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    Critical behavior at the dynamic Mott transition

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    Science
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    Abstract
    We investigate magnetoresistance of a square array of superconducting islands placed on a normal metal, which offers a unique tunable laboratory for realizing and exploring quantum many-body systems and their dynamics. A vortex Mott insulator where magnetic field-induced vortices are frozen in the dimples of the egg crate potential by their strong repulsion interaction is discovered. We find an insulator-to-metal transition driven by the applied electric current and determine critical exponents that exhibit striking similarity with the common thermodynamic liquid-gas transition. A simple and straightforward quantum mechanical picture is proposed that describes both tunneling dynamics in the deep insulating state and the observed scaling behavior in the vicinity of the critical point. Our findings offer a comprehensive description of dynamic Mott critical behavior and establish a deep connection between equilibrium and nonequilibrium phase transitions.
    Authors
    Poccia, N; Baturina, TI; Coneri, F; Molenaar, CG; Wang, XR; Bianconi, G; Brinkman, A; Hilgenkamp, H; Golubov, AA; Vinokur, VM
    URI
    http://qmro.qmul.ac.uk/xmlui/handle/123456789/13631
    Collections
    • Applied Mathematics [140]
    Licence information
    http://arxiv.org/abs/1408.5525
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