Phys. Rev. B 64, 024501 (2001) [5 pages]Possible high-Tc superconductivity mediated by antiferromagnetic spin fluctuations in systems with Fermi surface pocketsReceived 22 January 2001; published 7 June 2001 We propose that if there are two small pocketlike Fermi surfaces, and the spin susceptibility is pronounced around a wave vector Q that bridges the two pockets, the spin-singlet superconductivity mediated by spin fluctuations may have a high transition temperature. Using the fluctuation exchange approximation, this idea is confirmed for the Hubbard on a lattice with alternating hopping integrals, for which Tc is estimated to be almost an order of magnitude larger than those for systems with a large connected Fermi surface. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.64.024501
DOI:
10.1103/PhysRevB.64.024501
PACS:
74.20.Mn
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.