Abstract
By expanding the order parameter for an array of Josephson-coupled grains in powers of 1/z, where z is the number of nearest neighbors, I systematically incorporate the effect of phase fluctuations. The correction of order 1/z vanishes when the mean-field solution is known to be exact, for =zJ/U= and T*=T/zJ=0. For larger T* and smaller , the first-order correction increases until it diverges at the mean-field transition temperature.
Original language | English |
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Pages (from-to) | 7228-7231 |
Number of pages | 4 |
Journal | Physical Review B |
Volume | 39 |
Issue number | 10 |
DOIs | |
State | Published - 1989 |