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APS » Journals » Phys. Rev. B » Volume 49 » Issue 17
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Phys. Rev. B 49, 12058–12061 (1994)

Superconductivity in a quasi-one-dimensional spin liquid

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M. Sigrist
Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
Theoretische Physik, Eidgenössiche Technische Hochschule–Hönggerberg, 8093 Zürich, Switzerland

T. M. Rice
Theoretische Physik, Eidgenössiche Technische Hochschule–Hönggerberg, 8093 Zürich, Switzerland

F. C. Zhang
Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221

Received 30 September 1993; published in the issue dated 1 May 1994

The single-rung t-J ladder is analyzed in a mean-field theory using Gutzwiller renormalization of the matrix elements to account for strong correlation. The spin-liquid (resonance valence bond) state at half-filling evolves into a superconducting state upon doping. The order parameter has a modified d-wave character. A lattice of weakly coupled ladders should show a superconducting phase transition.

© 1994 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.49.12058
DOI:
10.1103/PhysRevB.49.12058
PACS:
71.27.+a, 74.20.Mn, 75.10.Jm
 
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