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4 papers · 2 filters
D-wave Bose-Einstein condensation and the London penetration depth in superconducting cuprates
A. S. Alexandrov, R. T. Giles
We show that bipolaron formation leads to a d-wave Bose-Einstein condensate in cuprates. It is the bipolaron energy dispersion rather than a particular pairing interaction which is…
Comment on `Experimental and Theoretical Constraints of Bipolaronic Superconductivity in High Materials: An Impossibility'
A. S. Alexandrov
We show that objections raised by Chakraverty (Phys. Rev. Lett. 81, 433 (1998)) to the bipolaron model of superconducting cuprates are the result of an incorrect approxim…
Normal state thermodynamics of cuprate superconductors
A. S. Alexandrov, G. J. Kaye
We propose a microscopic explanation of the pseudogap features discovered in the normal state specific heat and magnetic susceptibility of cuprates. In the framework of the bipolar…
Theory of tunnelling into and from cuprates
A. S. Alexandrov
A single-particle spectral density is proposed for cuprates taking into account the bipolaron formation, realistic band structure, thermal fluctuations and disorder. Tunnelling and…