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Charge Frustration Effects in Capacitively Coupled Two-Dimensional Josephson-Junction Arrays

Minchul Lee·Mahn-Soo Choi·M. Y. Choi
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Abstract

We investigate the quantum phase transitions in two capacitively coupled two-dimensional Josephson-junction arrays with charge frustration. The system is mapped onto the S=1 and $S=1/2$ anisotropic Heisenberg antiferromagnets near the particle-hole symmetry line and near the maximal-frustration line, respectively, which are in turn argued to be effectively described by a single quantum phase model. Based on the resulting model, it is suggested that near the maximal frustration line the system may undergo a quantum phase transition from the charge-density wave to the super-solid phase, which displays both diagonal and off- diagonal long-range order.

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Minchul Lee, Mahn-Soo Choi, M. Y. Choi. 1999-07-29. Charge Frustration Effects in Capacitively Coupled Two-Dimensional Josephson-Junction Arrays. https://doi.org/10.1103/physrevb.60.10455

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