Andreev and Single Particle Tunneling Spectroscopies in Underdoped Cuprates

Abstract

We study tunneling spectroscopy between a normal metal and underdoped cuprate superconductor modeled by a phenomenological theory in which the pseudogap is a precursor to the undoped Mott insulator. In the transparent tunneling limit, the spectra show a small energy gap associated with Andreev reflection. In the Giaever limit, the spectra show a large energy gap associated with single particle tunneling. Our theory semi-quantitatively describes the two gap behavior observed in tunneling experiments.

5 pages, 4 figures, submitted to Phys. Rev. Lett. minor changes of references

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Cited by in corpus (3)

• Effects of a particle-hole asymmetric pseudogap on Bogoliubov quasiparticles
• Resonating valence bonds and Fermi surface reconstruction: The resistivity in the underdoped cuprates
• Enhanced Josephson tunneling between high temperature superconductors through a normal pseudogap underdoped cuprate with a finite energy cooperon