Observation of domain-wall superlattice states in a frustrated triangular array of Josephson junctions
R. Théron, S. E. Korshunov, J. B. Simond, Ch. Leemann, P. Martinoli
DOI 10.1103/PhysRevLett.72.562 · Physical Review Letters
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Abstract
A family of ground states at frustrations f=1/2-(1/2)N−1, with N an integer ≥2, has been observed in the superfluid response of a triangular Josephson junction array as a function of the magnetic flux (∝f) threading a unit cell. These states can be constructed by introducing one- or two-dimensional superlattices of domain walls on the background of the checkerboard ground state at f=1/2, the 1D superlattice (striped phase) being energetically more favorable for N>3. A structural change of the ground state from the striped phase to a 2D superlattice of vacancies is predicted at fc≊0.468.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pb/Cu/Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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