Coherent oscillations of driven rf SQUID metamaterials

Melissa Trepanier; Daimeng Zhang; Oleg Mukhanov; V. P. Koshelets; Philipp Jung; Susanne Butz; Edward Ott; Thomas M. Antonsen; Alexey V. Ustinov; Steven M. Anlage

doi:10.1103/PhysRevE.95.050201

Coherent oscillations of driven rf SQUID metamaterials

Melissa Trepanier, Daimeng Zhang, Oleg Mukhanov, V. P. Koshelets, Philipp Jung, Susanne Butz, Edward Ott, Thomas M. Antonsen, Alexey V. Ustinov, Steven M. Anlage

DOI 10.1103/PhysRevE.95.050201 · Physical Review E

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Abstract

Through experiments and numerical simulations we explore the behavior of rf SQUID (radio frequency superconducting quantum interference device) metamaterials, which show extreme tunability and nonlinearity. The emergent electromagnetic properties of this metamaterial are sensitive to the degree of coherent response of the driven interacting SQUIDs. Coherence suffers in the presence of disorder, which is experimentally found to be mainly due to a dc flux gradient. We demonstrate methods to recover the coherence, specifically by varying the coupling between the SQUID meta-atoms and increasing the temperature or the amplitude of the applied rf flux.

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Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown