Abstract
The effect of quantum fluctuations of vortices on the low temperature specific heat and reversible magnetization in the mixed state in highly anisotropic layered superconductors is discussed. For reversible magnetization, M, the change of slope in the dependence of M vs ln B, observed in Bi(2:2:1:2) single crystals, is explained. In the mean field approach this slope should be almost B independent. The authors show that for magnetization quantum fluctuations are important at all temperatures except in a narrow region near {Tc}. The specific heat due to the vortex fluctuation contribution is predicted to be linear in T at low T and to increase logarithmically with B.
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