Phenomenological aspects of phase fluctuation in high Tc superconductors: Cooper pair droplets

Chakraverty, B. K. ; Ramakrishnan, T. V. (1997) Phenomenological aspects of phase fluctuation in high Tc superconductors: Cooper pair droplets Physica C: Superconductivity, 282-287 (1). pp. 290-293. ISSN 0921-4534

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S09214...

Related URL: http://dx.doi.org/10.1016/S0921-4534(97)00263-3

Abstract

We point out how fluctuation of the phase of the superconducting order parameter can play a key role in our understanding of high Tc superconductors. A simple universal criterion is given which illustrates why all oxide superconductors in contrast to classical superconductors ought to behave as a lattice of cooper pairs. Tc is to be thought of as the temperature of phase coherence or the temperature above which the lattice of Cooperpair "melts" into a phase of Cooper-pair droplets that starts forming at T ≈ T*. This is the pseudo-gap region. Quantum fluctuation of the phase predicts a superconductor to insulator phase transition for all underdoped materials.

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Deposited On:29 Jun 2011 13:09
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