## Abstract

Effects of quantum phase fluctuations on the critical temperature T_{c} of Josephson-coupled layered superconductors are considered. T_{c} is shown to decrease nonlinearly with increasing charge fluctuations. The results obtained for the critical temperature by applying the self-consistent mean field method reveal no phase transition from superconducting state to normal metal for a finite value of charging energy. The destruction of the long range phase coherence appeared to occur at asymptotically large values of self-capacitance charging. For the weak quantum phase fluctuations limit, T_{c} is obtained to be vary in the interval of T_{c}* < T_{c} < T^{(2)}_{c}, where T^{(2)}_{c} is the critical temperature for a single superconducting layer evaluated by the mean field theory, and T_{c}* is the temperature when the phase coherence between the nearest neighboring layers is lost. Since T_{c} approaches T_{c}* with vanishing interlay er tunneling integral J_{⊥}. Calculation of the dependence of the transverse stiffness on the charging energy is carried out at T=0. The reentrance found can in principle occur at a sufficiently large value of the interlayer tunneling integral J_{⊥} > J^{cr}_{⊥} = kT^{(2)}_{c}, where J^{cr}_{⊥}≈ kT^{(2)}_{c} is the value of J_{⊥} when the superconductor normal metal phase transition takes place. However, the condition J_{⊥}≥ kT^{(2)}_{c} contradicts to the existence of the Josephson coupling between superconducting layers.

Original language | English |
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Pages (from-to) | 307-318 |

Number of pages | 12 |

Journal | Physica C: Superconductivity and its Applications |

Volume | 296 |

Issue number | 3-4 |

DOIs | |

Publication status | Published - 20 Feb 1998 |