Title 



Superconducting transition temperatures and coherence length in nonswave pairing materials correlated with spinfluctuation mediated interaction
 
Author 



 
Abstract 



Following earlier work on electron or hole liquids flowing through assemblies with magnetic fluctuations, we have recently exposed a marked correlation of the superconducting temperature Tc for nonswave pairing materials, with coherence length xi and effective mass m*. The very recent study of Abanov et al. [Europhys. Lett. 54, 488 (2001)] and the prior investigation of Monthoux and Lonzarich [Phys. Rev. B 59, 14 598 (1999)] have each focused on the concept of a spinfluctuation temperature Tsf, which again is intimately related to Tc. For the dwave pairing via antiferromagnetic spin fluctuations in the cuprates, these studies are brought into close contact with our own work, and the result is that k(B)T(sf)similar to(h) over bar /m*xi(2). This demonstrates that xi is also determined by such antiferromagnetic spinfluctuation mediated pair interaction. The coherence length in units of the lattice spacing is then essentially given in the cuprates as the square root of the ratio of two characteristic energies, namely, the kinetic energy of localization of a charge carrier of mass m* in a specified magnetic correlation length to the hopping energy. The quasitwodimensional ruthenate Sr2RuO4, with T(c)similar to1.3 K, has pwave spintriplet pairing and so is also briefly discussed here.   
Language 



English
 
Source (journal) 



Physical Review B  
Publication 



2002
 
Volume/pages 



65:9(2002), p. 14
 
Article Reference 



092509
 
ISI 



000174547900035
 
Medium 



Eonly publicatie
 
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