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Interlayer tunneling in a non-Fermi-liquid metal

S. Khlebnikov
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Abstract

We study the effect of interlayer tunneling in the gauge theory describing a quasi-two-dimensional paramagnetic metal close to a second-order or weakly first-order antiferromagnetic phase boundary. In that theory, two species of fermions have opposite (rather than equal) charges with respect to the gauge field. We find that single-particle interlayer tunneling is suppressed at low energies. The effect of pair tunneling is analyzed within the $(3-d)$ expansion. The resulting phase diagram has superconducting and non-Fermi-liquid normal phases, and so is compatible with that of the copper-oxide superconductors.

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S. Khlebnikov. 1995-08-14. Interlayer tunneling in a non-Fermi-liquid metal. https://doi.org/10.1103/physrevb.53.r11964

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