Pairing of Cooper Pairs in a Fully Frustrated Josephson Junction Chain

Details Pairing of Cooper Pairs in a Fully Frustrated Josephson Junction Chain Pairing of Cooper Pairs in a Fully Frustrated Josephson Junction Chain

2002-02-07

arxiv.org/abs/cond-mat/0202115v2

Phys. Rev. Lett. 88, 227005 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 EPS figures

Scientific paper

10.1103/PhysRevLett.88.227005

We study a one-dimensional Josephson junction chain embedded in a magnetic field. We show that when the magnetic flux per elementary loop equals half the superconducting flux quantum $\phi_0=h/2e$, a local $\nbZ_2$ symmetry arises. This symmetry is responsible for a nematic Luttinger liquid state associated to bound states of Cooper pairs. We analyze the phase diagram and we discuss some experimental possibilities to observe this exotic phase.

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