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Sahebsara P, Sénéchal D. Antiferromagnetism and superconductivity in layered organic conductors: Variational cluster approach. Phys Rev Lett. 2006;97(25):257004doi: 10.1103/PhysRevLett.97.257004.
Sahebsara, P., & Sénéchal, D. (2006). Antiferromagnetism and superconductivity in layered organic conductors: Variational cluster approach. Physical review letters, 97(25), 257004. https://doi.org/10.1103/PhysRevLett.97.257004
Sahebsara, P, and Sénéchal, D. "Antiferromagnetism and superconductivity in layered organic conductors: Variational cluster approach." Physical review letters vol. 97,25 (2006): 257004. doi: https://doi.org/10.1103/PhysRevLett.97.257004
Sahebsara P, Sénéchal D. Antiferromagnetism and superconductivity in layered organic conductors: Variational cluster approach. Phys Rev Lett. 2006 Dec 22;97(25):257004. doi: 10.1103/PhysRevLett.97.257004. Epub 2006 Dec 20. PMID: 17280384.
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Phys Rev Lett. 2006 Dec 22;97(25):257004. doi: 10.1103/PhysRevLett.97.257004. Epub 2006 Dec 20.

Antiferromagnetism and superconductivity in layered organic conductors: Variational cluster approach.

Physical review letters

P Sahebsara, D Sénéchal

Affiliations

  1. Département de physique and Regroupement québécois sur les matériaux de pointe, Université de Sherbrooke, Sherbrooke, Québec, Canada, J1K 2R1.

PMID: 17280384 DOI: 10.1103/PhysRevLett.97.257004

Abstract

The kappa-(ET)2X layered conductors (where ET stands for BEDT-TTF) are studied within the dimer model as a function of the diagonal hopping t' and Hubbard repulsion U. Antiferromagnetism and d-wave superconductivity are investigated at zero temperature using variational cluster perturbation theory (VCPT). For large U, Néel antiferromagnetism exists for t' < t(c2)', with t(c2)' approximately 0.9. For fixed t', as U is decreased (or pressure increased), a d(x2-y2) superconducting phase appears. When U is decreased further, then a d(xy) order takes over. There is a critical value of t(c1)' approximately 0.8 of t' beyond which the AF and dSC phases are separated by the Mott disordered phase.

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