Investigation of spontaneous magnetization of coupled 2×2 superconducting π ring array

• 来源期刊: 中国物理（英文版）
• 关键词: π ring array Josephson junction spontaneous magnetization
• 年，卷（期）: 2004,（4）
• 页码范围: 532-537
• 页数: 6页
• 语种: 英文

摘要

We present the theoretical investigation of spontaneous magnetization of a coupled 2 × 2 π ring array. It is indicated by free energy calculation that the system has the lowest energy when the four π rings have the full antiparallel configuration. Furthermore, the numerical evaluation results show that the system which favours full antiparallel spontaneous magnetization is a quantum effect deriving from the phase cohering of the superconducting quantum wavefunctions in the four superconducting rings through the shared Josephson junctions.