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We present a theory of tunneling spectroscopy for normal metal/Larkin-Ovchinnikov state junctions in which the spatial periodic modulation in the pair potential amplitude is taken into account. The tunneling spectra show the characteristic line shapes reflecting the minigap structures under the periodic pair potentials depending on the boundary condition of the pair potentials at the junction interface. These features are qualitatively different from the tunneling spectra of the Fulde-Ferrell state. We propose an experimental setup which identifies the superconducting state of CeCoIn5.
Digital Object Identifier: 10.1103/PhysRevLett.98.077001
Published with permission from the copyright holder. This is the institute's copy, as published in Physical Review Letters, 16 February 2007, 98, 077001, Pages 1-4.
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PACS: 74.45.+c, 74.20.Rp, 74.50.+r
Copyright © 2007 American Physical Society. All rights reserved.
Physical Review Letters